Costly Intervention

You attempt to intervene when a creature is in the process of casting a spell. If the creature is casting magic, you must succeed on a check to twist their spell into twisted necrotic energy. The DC equals 5 + the casters level. On a success, the spell fails and the creature casting the spell is struck with 2d6 necrotic damage.

This spell has no effect on Undead spell casters.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the interrupted dispel magic has no effect if its level is less than or equal to the level of the spell slot you used.