Back Alley Smoke Break

You've been no stranger to late nights and stressful environments, and along the way you've picked up some rather nasty habits to ease your nerves. Somehow, you've managed to replicate smooth drag of a cigarette in spell form

Sacrifice 2D4 + (Spellcasting Mod) Health, and in return gain twice that in temporary hit points.

Using a Higher-Level Spell Slot. You sacrifice an additional 1d4 per spell slot used, above the 1st level.