Instant Health

Instant Health is a instant status effect which increases health for living mobs and damages the undead.

Effect
Instantly damages  × 2level. Undead mobs (including the wither) are damaged as if with Instant Damage, instead. If the effect is forced to last longer than one tick, it will damage entities every tick (with the exception of lingering potions, which only damage every second). Levels 30–32 provide no damage. Amplifiers outside the range 0–31 (corresponding to levels 1–32) are used modulo 32.

Immune mobs
Only the ender dragon is immune. However, undead mobs will be harmed by this effect.

History
瞬间治疗