Blood Pool

Starting level 2nd, you gain access to a "Blood pool" that fills when you take damage or when a creature is dealt damage within 30 feet of you, your pool fills by the amount of damage dealt, but never further than its current capacity, determined by your wizard level x 5. You can use these points in your blood pool to fuel your peculiar spells and abilities.

Blood Dice

You may spend multiple of 2 points from you blood pool to obtain a blood die. You may use a number of blood dice "per channel" equal to your intelligence modifier (minimum 1). Blood dice are used by your healing and harming blood features. Your blood dice grow along with your level, starting level 2nd your blood dice are d4s, upon reaching level 6th they become d6s, then d8s at level 10th and d10s at level 14th. (Optional: Upon reachin level 20th they become d12s as you master you arcane)

Healing Blood

Starting level 2nd, you are able to use the blood in your pool to heal allies. As an action, you can touch a creature and convert blood points into blood dice (like specified in the rules above) to heal them by that amount plus your intelligence modifier. Upon reaching level 6th, you can spend 1 extra point from your pool to heal an ally within 30 feet of you.

Harming Blood

Starting level 6th, as an action, you can spend points from you blood pool to harm foes. The rules are the same from your "healing blood" feature, but you deal necrotic damage instead of healing. Starting level 10, you may use this feature on enemies within 30 feet of you.

Tainted Blood

Starting level 10th, you have full control over your own blood, therefore you are able to neutralize or expel toxins or pathogens from you bloodstream. You become immune to poison and illness. Upon reaching level 14th, you are able to stockpile poison, toxins and illness you have been subjected to, despite your immunity, and replicate them. When you deal damage or heal a creature with your blood pool, you may choose to apply the effects of a poison or an illness you have been in contact with. Any saving throw that would be required is done on the same ability required by original poison or illness, but scales with your spells DC (8 + your proficiency bonus + your intelligence modifier).

Master Hemomancer

Starting level 14th, if you attempt to use any class feature or spell that requires you to pay blood points from your pool and you don't have enough, you may take necrotic damage equal to the difference and use the feature or cast the spell by paying with your own blood. The amount of necrotic damage taken this way can't be healed or recovered unless you are cured with a greater restoration spell or an effect that removes curse. Alternatively, you may regain the lost hit points by spending hit dice to heal during a short rest or by completing a long rest.

Blood Conversion

At level 20th, you may empty your blood pool entirely to fuel an hemomancy spell, you may cast an hemomancy spell of a level equal to or lesser than the amount of blood points spent x 10, even if you have no spell slot left. For example if you have 50 blood points in your pool, you empty it to cast an hemomancy spell up to a level 5 maximum. Whenever you do so you get increasingly exhausted gaining one exhaustion level plus another one for each time you do so. (First time 1 level, second time 2 levels, then 3 and so on).

Hemomancy Spells

As hemomancer wizard, you are able to add to your spellbook hemomancy spells. Whenever you are preparing your spell for the day, you may change any of your regular wizard spells with hemonacy spells of the same level. You may gain access to additional hemomancy spells in two ways (decide with your DM): either you have them from the start and unlock them by leveling, or you have to find hemomancy tomes or master hemomancer that are willing to teach you. Another way would be seeing them from other spellcasters.

Blood Horror

Medium aberration

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• Armor Class 11 + the level of the spell (natural armor)
• Hit Points 40 + 10 for each spell level above 4th
• Speed 30 ft.

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STR	DEX	CON	INT	WIS	CHA
16(+3)	10(+0)	15(+2)	16(+3)	10(+0)	6(-2)

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• Damage Immunities Slashing
• Senses Darkvision 60 ft, Passive perception 10
• Languages Common, Deep Speech and understands any language you speak
• Challenge -
• Proficiency Bonus Equals your bonus

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Armored Spikes (Dreadnought Only) The blood horror has +1 to AC, furthermore any creature attacking it in melee takes 4 (1d8) piercing damage.

Healing Aura (Vitae Only). The blood horror heals allies within 20 feet of it by 5 hit points at the start of its turn.

Skulker (Stalker only) The blood horror has proficiency in stealth and can hide as a bonus action.

Blood pool healing As an action, you as a caster may empty your blood pool to heal your summon by that amount.

Actions

Multiattack. The blood horror makes a number of attacks equal to half this spell’s level (rounded down).

Claws (Stalker Only). Melee Wapon Attack: your spell attack modifier to hit, 5 feet, one target. Hit: 1d8 + 3 + the spell’s level slashing damage. If the target is a creature, and was hit with advantage, once per turn the stalker gains 3d6 sneak damage bonus.

Slam (Dreadnought Only). Melee Wapon Attack: your spell attack modifier to hit, 5 feet, one target. Hit: 1d10 + 3 + the spell’s level bludgeoning damage plus the target has to roll a Strength check (DC determined by you spells DC) or is knocked prone.

Bloodbolt (Vitae Only). Ranged Wapon Attack: your spell attack modifier to hit, range 120 feet, one target. Hit: 1d8 + 3 + the spell’s level force damage. The damage dealt with this attack replenishes your blood pool regardless of the range.

Arcane Transfusion (@dungeonmaster_dad)

3rd-level Hemomancy

• Casting Time: 1 Action
• Range: 20 feet
• Components: V,S
• Duration: Concentration, up to 1 minute

With a stab of your arcane force you can siphon blood from others to supplement your blood pool. Make a ranged spell attack against a creature within range. On a hit, your gain 3d6 points to your blood pool, and the target takes necrotic damage equal to half the amount of blood points lost. Until the spell ends, you can make the attack again on each of your turns as an action. Through use of this spell, you can gain blood points above your normal maximum. These “temporary” blood points in your pool cannot be regained once used and can never total more than your original blood pool capacity. (i.e a hemomancer with 15 point blood pool max cannot gain more than 15 “temporary” blood points)

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the blood points gained increases by 1d6 and the range increases by 10ft, for each.

Blood Extortion (@rwdarlow)

2nd-level Hemomancy

• Casting Time: 1 Action
• Range: 30 feet
• Components: V,S
• Duration: Concentration, up to 1 minute

A target creature who can bleed must make a Constitution save, on a failure a spectral hand extracts blood from their arms and they are drained 3d6 Hit Points and you automatically convert this damage to your blood pool. Immediately after as a bonus action you can spend all the blood for from your blood pool for healing any ally or harming an enemy. At third level or higher this spell does an additional 2D6 damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, increase the damage by 2d6.

Crimson Scythe (@bardic.inspired.barbarian)

3rd-level Hemomancy

• Casting Time: 1 Action
• Range: 60 feet
• Components: V,S
• Duration: Concentration, up to 1 minute

You conjure up a weapon used by the Crimson King himself, you can use this weapon yourself, or you can give it to a willing creature within range (All creatures except you do not have proficiency with this weapon.) When conjured, this weapon deals 4d6 + the creatures strength modifier in magical slashing damage on a hit.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the extra damage increases by 1d6 for each slot level above 3rd.

Blood canon (@bardic.inspired.barbarian)

2nd-level Hemomancy

• Casting Time: 1 Action
• Range: 60 feet
• Components: V,S,M (5 blood points from your blood pool)
• Duration: Instantaneous

You conjure up a small ball of blood that's 10 inches in diameter and shoot it at one target you can see within range. Make a ranged spell attack, on hit, the target takes 2d8 bludgeoning damage and is knocked prone

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the extra damage increases by 1d6 for each slot level above 3rd.

Healing rain (@bardic.inspired.barbarian)

4th-level Hemomancy

• Casting Time: 1 minute
• Range: 30 feet
• Components: V,S,M (20 blood points from your blood pool)
• Duration: 1 round

You slam down onto the ground and a Crimson colored raincloud appears 30 ft above you in a sphere, Chose up to 8 willing creatures, those creatures gain 5d10 HP, and gain 4d4 temporary HP.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the HP increases by 1d10, and the temporary hp increases by 1d4 for each slot level above 4th.

Blood pool (@bardic.inspired.barbarian)

5th-level Hemomancy

• Casting Time: 1 action
• Range: 30 feet sphere
• Components: V,S,M (25 blood points from your blood pool)
• Duration: 1 minute

You conjure a pool of blood that flows with the intent to flow farther, any creature that starts their turn in this area must make a constitution saving throw against your spell save DC or take 4d10 magical slashing damage. if a creature fails. The pool of blood extends an extra 5 ft in a direction you chose. This area is considered difficult terrain, and is also considered running water.

Blood Bomb (@voicegawd)

3rd-level Hemomancy

• Casting Time: 1 reaction
• Range: 30 feet
• Components: V,S (Blood from your pool or from a wound)
• Duration: Instantaneous

If you or an ally within range take damage from an attack, you may use your reaction to cause the blood lost from the wounds to counter attack an enemy within 5 feet of you or the wounded target. The enemy takes half the damage it has inflicted on the hit target and if you wish, you may spend blood from your pool to add damage to this counter attack. (E.g. you or an ally takes 10 damage, you use your reaction to cause 5 damage to an opponent within range, if you add for example 20 point from your blood pool instead the damage of the counter attack becomes 15 instead becuase you add half of it)

Blood Mace (@the_dms_tome)

3rd-level Hemomancy

• Casting Time: 1 bonus action
• Range: self
• Components: V,M (1 liter of humanoid blood)
• Duration: Concentration, up to 1 minute

You create a vile mace made of blood. The mace counts as a +1 magic morningstar and has the same proprieties except the range which is increased up to 20 feet instead of the regular 5. When you hit a target with this mace you deal an additional 1d4 of necrotic damage. You may also spend any amount of blood points from your pool to deal extra necrotic damage equal to the amount of points spent.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, it deals an additional 1d4 necrotic damage for each slot level above 3rd.

Blood Storm (@the_dms_tome)

8th-level Hemomancy

• Casting Time: 2 rounds
• Range: 300 feet
• Components: V, S, M (a humanoid skull or at least a ruby worth 1000 gp)
• Duration: Concentration, up to 1 minute

This spell consumes all the points in your blood pool. Upon casting Blood Storm a giant black cylinder centered on you appears engulfing an area of 150 feet. The cylinder reaches up to 60 feet of height. From this cylinder rains acidic and corrupted blood that drives its victim to madness. Upon casting the spell, you may choose the number of creatures immune to the effect of the rain alongside yourself. At the start of each of you following turns for the duration of the spell, every non immune creature has to roll a Constitution saving throw or take 8d6 necrotic damage and 8d6 acid damage on a failed save or half as much on a successful save. A target who has failed the Constitution save has to roll a Charisma saving throw or be affected by a long term madness effect from the table (up to the DM discretion). A successful roll negates the madness.

At Higher Levels. When you cast this spell using a spell slot of 9th level, the necrotic and acid damage increase to 10d6 each.

Blood Blaze (@studmuffin55___)

3rd-level Hemomancy

• Casting Time: 1 bonus action
• Range: self
• Components: S (a drop of your own blood)
• Duration: Concentration, up to 1 minute

You coat your weapon with your own blood and set it ablaze with a dark red necrotic flame. Attacks with this weapon do an extra 1d4 fire damage and 1d4 necrotic damage.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, it deals an additional 1d4 necrotic damage for each slot level above 3rd.

Hemophobia (@studmuffin55___)

3rd-level Hemomancy

• Casting Time: 1 reaction
• Range: 60 feet
• Components: V, S (taking damage from an enemy attack or spell)
• Duration: Concentration, up to 1 minute

After taking damage, you make creatures that can see you make a wisdom save. A failed save causes the creature to be frightened of you and take 2d6 psychic damage each round it fails this save. A successful save gets none of the above effects

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you may target an additional creature within range for each slot level above 3rd.

History

The Crimson King is an entity associated with the Hemomancy, some scholars say that He was born in ancient times, alongside the first forms of magic. When people didn't have the same expertise as we do today, where experiments still were made to test the boundaries and the powers of arcane spells. It is said that He was considered a God back in those days, since His powers came from one of the primal form of magic, the one that used the source of life as source of power, the blood. Those who worshipped the Crimson King were blessed with the ability to manipulate vitae (as it's called by hemomancers) and could use it either to heal or harm.

With time, people started to fear hemomancers as magic was developing, spells improved and instead of blood other material components were preferred so no person or animal would be harmed in their casting. Therefore, many hemomancers, even harmless or helpful ones, where hunted down, extinguished or driven away, in an attempt to make the practice of hemomancy disappear. Only in most recent times the old tomes were found again and voice of the Crimson King and this magic practice spread again, gainig a bunch of chosen adepti.

Appearance

The Crimson King looks like a towering humanoid entirely made of blood. It's usually depicted as having glowing red eyes, a horned helm on its head made of hardened blood, and having several chains hanging from its "armor" made entirely from the iron contained in blood. As weapon of choice it usually wields a spear or a scythe. Its voice is said to be deep, thundering and authoritarian.

Behavior

It's not very clear what are the goals of the Crimson King, many Gods have changed through the course of time and the younger ones seems to not even recall him. More ancient ones usually refuse to talk about him and avoid even pronouncing his name if possible. So the only informations available come from those who have embrace Hemomancy and decided to interact with this entity. The most common idea is that the Crimson King is neither good or bad, it has its own agenda and prefers to keep it unknown even to other Gods or godly entities. It will usually grant power and knowledge to those who he deems worthy, but will punish those who cross the boundaries set by the old pacts or disrespect/betray him. Usually when a spell is cast and blood is used to do so, his followers are conviced that some of it is offered to him.

The Scarlet Kingdom

The domain that exists in its own demiplane, where endless waterfalls made of the blood offered by its followers converge into a large pool, that usually spawns its gargantuan body each time it decides to manifest. Above this pool a floating city exists where its inhabitants are only the best among its servants, specifically chosen to tend to the city needs and to worship the Crimson King himself.