The Magic: The Gathering card Plunge Into Darkness is rapidly spiking, leaping from $10.60 to $49 in just the past three days. Plunge Into Darkness is a pretty weird card that's best described as a pseudo-tutor. It lets you dig through your library as deep as you like to find a card, provided you pay life. Best I can tell, that demand was created by a content creator fittingly named Aspiringspike, who highlighted a combo deck that's started to take off in Modern right now. Notably, while this spike is very visible on TCGPlayer, Plunge Into Darkness is still available on other stores like Card Market relatively cheap.