Astral Gift of Doom

You may have a number of pact weapons equal to your proficiency modifier

Weapon Ancestry: when you summon a new pact weapon for the first time you become proficient in that weapon type forever.

Doom Arrives: When You Hit and enemy below half heath with any attack or spell you may do a damage roll with one of your Pact weapons and add the result to your spell or damage roll. you always know when something living is near death

Astral Restoration: When you deal a killing blow you may give yourself temporary hit points equal to your level