Pact Boon Option
When you gain the Pact Boon feature at 3rd level, you can choose the following additional option.
Pact of the Skin
Your patron gives you a new body. You decide the appearance of your new body, including its race, age, and sex. If your race changes, you replace your original racial traits with the traits of your new race (see chapter 2 of the Player's Handbook for race options). If you have missing body parts, you can restore them. None of your other game statistics change.
Your new body gives you a base AC of 17 (your Dexterity modifier doesn't affect this number). If the armour you wear would leave you with a lower AC, you can determine your AC using this feature. You can still gain this benefit while using a shield. In addition, when you spend a Hit Die to heal during a short rest, you can use the maximum value for each die.
Eldritch Invocations
At 2nd level, a warlock gains the Eldritch Invocations feature. Here are new options for warlocks with the Pact of the Skin feature, in addition to the options in the Player's Handbook.
If an eldritch invocation has a prerequisite, you must meet it to learn the invocation. You can learn the invocation at the same time that you meet its prerequisite. A level prerequisite refers to your level in this class.
Eldritch body
Prerequisite: Pact of the Skin
You can use a bonus action to grow a natural weapon from part of your body, which you are proficient with and can use to make melee weapon attacks. It lasts until you use a bonus action to dismiss it, or until you use this feature again.
Each time you create a natural weapon, you determine its appearance, such as claws or a pair of horns, and whether it deals bludgeoning, piercing, or slashing damage. On a hit, it deals damage equal to 1d10 + your Strength modifier, and you can push the target up to 10 feet away from you.
When you cast a spell that requires a melee weapon, such as green-flame blade, you can use a weapon you create using this feature in place of the weapon required by the spell.
Your Pact Boon
Your new body's appearance may reflect the nature of your patron. The following provides inspiration for a warlock with the Pact of the Skin.
The Archfey. Your appearance might change to reflect a certain season, like summer or winter. You might become inhumanly beautiful, or alternatively, wither until you seem an old, wizened hag.
The Fiend. Your skin might turn red or leathery, and you might grow horns or a tail. Your teeth may sharpen, and your body might become unnaturally warm (or cold) to the touch.
The Great Old One. You might lose colour in your eyes, hair, or blood, or seem faintly translucent. You might be more comfortable submerged in water, or never seem to blink or shut your eyes.
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Unstopping Heart
Prerequisite: 7th level, Pact of the Skin
You can cast death ward once on yourself without expending a spell slot. You can't do so again until you finish a long rest.
Eternal Flesh
Prerequisite: 12th level, Pact of the Skin
You no longer age and can't be aged magically, and you are immune to disease and poison. In addition, when you spend a Hit Die to heal during a short rest, you can cause any missing body parts you have—such as eyes or hands—to grow back.
Unearthly Flight
Prerequisite: 15th level, Pact of the Skin
You can use a bonus action to sprout a large pair of wings from your back, gaining a flying speed equal to your current speed. You can shed your wings using another bonus action.
You can't sprout wings while wearing armour that doesn't accomodate them, and clothing not made to accommodate your wings might be destroyed when you manifest them.