Boil Blood - Kibble's Tasty

Targeting a creature that has taken slashing or piercing damage in the last minute, make it's blood heat and boil. The target creature must make a Constitution saving throw. On failure, it's blood begins to heat. At the start of it's turn while effected, it takes 3d4 fire damage and is crippled with agony, all terrain is difficult terrain for it.
At the end of each of its turns, the target can make another Constitution saving throw. On a success, the spell ends on the target.

At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 2d4 for each slot level above 2nd.