For the race of plant-like creatures, see Blight (race).
Blight is a level 4 necromancy spell. This spell allows spellcasters to drain the moisture and vitality from a target creature using necromantic energy. It's especially effective versus plants.
Description
Deals 8d8Necrotic to a target. Plants take maximum damage from this spell, and have Disadvantage on the Saving throw against it.
There are very few plants in the game. By the time you get this spell you're likely in Act II where all the plants are resistant to necrotic damage anyway, so the maximum damage clause is rarely relevant.
The incantation for Blight is Perē, the Latin command "vanish/be destroyed!"