Bahn's Brand

The target creature must make a Constitution saving throw. On a successful save, the creature takes 1d4 Necrotic damage. On a failed save, the creature takes 1d4 Necrotic damage and is Marked. A creature Marked by this spell takes an additional 1d4 psychic damage if it takes damage from an attack or spell before the end of your next turn.

A creature cannot be Marked more than once at any given time. A creature's Mark vanishes once they take psychic damage from this spells effect.

This spell's damage dice increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).