Level 3
Dark Bargain.
Your Patron grants you knowledge of fire spells. Whenever you kill another creature in combat, gain WILL+LVL temporary HP.
*Note: the GM should only run combat against foes that pose a significant threat, no stabbing bags of rats for free Temp HP.
Level 7
Dark One's Own Luck.
(1/Safe Rest) Free Reaction(When you would make a roll, or a roll is made against you): cause the roll to become 1 or a Crit. You can expend a use of Pilfered Power to use this ability again.
Level 11
Advanced Negotiation.
(1/Encounter) When you would benefit from Dark Bargain, you can instead choose to regain a use of Pilfered Power. Learn one Utility Spell from any spell school.
Level 15
Blood Pact.
When you take half your max HP in damage from using Pilfered Power, the spell you cast deals extra damage equal to twice that amount.