Pact Boon Option
3rd-level warlock feature
When you choose your Pact Boon feature, the following option is available to you.
Pact of the Shield
Your patron grants you a magical shield, called your pact shield, to protect you from harm. You are proficient with it and other shields, wielding it doesn't interfere with performing the somatic components of spells, and you can use it as an arcane focus for your warlock spells.
You can transform one magic shield into your pact shield by performing a special ritual while you hold the shield. You perform the ritual over the course of 1 hour, which can be done during a short rest. You can’t affect an artifact or a sentient shield in this way. The shield ceases being your pact shield if you die, if you perform the 1-hour ritual on a different shield, or if you use a 1-hour ritual to break your bond to it.
Additionally, you learn the shield spell, it doesn't count against your number of spells known, and when you cast the spell at higher levels, the bonus to AC increases by +1 for each slot level above 1st.
Eldritch Invocation Options
When you choose eldritch invocations, you have access to these additional options.
Accursed Shell
Prerequisite: 9th-level warlock, Pact of the Shield
You can cast fire shield once without expending a spell slot. You regain the ability to do so when you finish a long rest.
Additionally, When you cast fire shield, you can choose to instead activate an accursed shield, which grants you resistance to radiant damage and deals necrotic damage.
Eldritch Protection
Prerequisite: 5th-level warlock, Pact of the Shield
While you are wielding your pact shield, you can wield a second shield, gaining the benefits of both.
Improved Pact Shield
Prerequisite: Pact of the Shield
Your pact shield grants a +1 magical bonus to your armor class, if it doesn't already, and to Dexterity saving throws you make while you wield it.
Subsuming Shield
Prerequisite: 15th-level warlock, Pact of the Shield
As a reaction to being targeted by a spell attack or a spell that requires a Dexterity saving throw, you can brandish your pact shield and attempt to absorb the spell's energy. If the spell is of 5th level or lower, the spell fails, has no effect, and you regain an expended warlock spell slot. If the spell is of 6th level or higher, make a Charisma ability check. The DC equals 10 + the spell's level. On a success, the spell fails, has
no effect, and you regain an expended warlock spell slot.
Once you use this invocation, you can't do
so again until you finish a long rest.
