Negative gold pieces. Semi-sentient coins that just argue with you no matter what you say. Or worse, Monty Python’s argument sketch.
As a former raid healer in WoW I feel that. Don’t stand in the fire!
The first one is just the effect of the shadow blade spell. One of my favorite spells, by the way.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.