Cursed Skeleton

Cursed Skeleton is a demon found in Iris and the Giant.

"The sorrow which infects this demon is tremendous. I'll try not to catch it."

Location
In Path of the Giant, Cursed Skeletons can be found on Floors 10 & 15 on all difficulties, and also on Floor 4 on Nightmare difficulty.

In Path of the Ferryman, they can be found on Floors 6 & 24 on all difficulties, and also on Floor 23 on Easy & Classic difficulty.

Strategy
Cursed Skeletons will appear as a puddle on the ground. When attacked, they will rise out of the puddle, and they must be attacked again to be defeated. If your turn ends when they are above ground, they will attack dealing no damage but will add one Sorrow card to your bag and return to their puddle; they can attack from anywhere on the battle area. To defeat them you should use an extra turn or use replayable cards like Sword.