Miasma

R: 50 ft; T: [dice]x10 ft radius sphere; D: [sum] Rounds

A cloud of toxic red mist appears in the target area. All breathing creatures of [dice] Grit Dice or less must Save vs Might or immediately die. After 1 minute, they are raised as zombies outside your control.

At 3 [dice], they are raised as wights instead.