Pact of the Ancient

You have stumbled upon a powerful yet ancient artifact, while dormant you have bonded to it as its power slowly reawakens. Warlocks who form this pact are a terrifying force as their will and might is their own, they answer to no patron, they are restricted by no means, through the emerging power from their wielded artifacts they are gifted with unlimited potential in destructive force, ancient power of the past now lay in their hands, how they shall use the power is anyone's guess.

Ancient Power

At 1st level you can choose one warlock spell in your spell list that is equal to half your proficiency bonus (rounded down), you can cast the spell once without using a spell slot these spells are casted at the lowest possible level, you can change this spell after you finish a short or long rest. You can store and use an additional spell at 6th, 10th, and 14th level. Your total amount of stored spells cannot have a combined level exceeding your proficiency bonus.

Untapped Power

At 1st level you choose on cantrip from the Warlock spell list, you choose what damage type it deals, you can change both the cantrip and damage type at the end of a short or long rest.

Mystical Bond

At 6th level as a reaction to taking damage you can sacrifice a use of your Ancient Power feature to reduce the damage equal to twice your total warlock level.

Mystical Reinvigoration

At 10th level as a reaction to a creature being reduced to 0HP within 30ft of you, you can expend a use of your Ancient Power feature to bring them back up with HP equal to 1+double the stored spells level, only one creature can be affected per short rest.

Ancient Calling

At 14th level you gain resistance to damage from spells and have advantage on spell saves. Additionally whenever you are targeted by a spell and succeed the save you regain one use of your Ancient Power feature.