Erixmethane, the Riddler

Flying
Whenever Erixmethane, the Riddler blocks a creature, clash with that creature's controller. If
you win, remove that creature from combat. Its controller puts the top eight cards of their library
into their graveyard.
There are two skeletons inside the altar of
Erixmethane. Their owners are the only ones to have answered her riddles correctly.