Eldritch Mask of Bhu'Rehm

Equipped creature gets +2/+2 and has menace
and "At the beginning of your end step, put the
top three cards of your library into your
graveyard."
Whenever equipped creature deals combat
damage to a player, that player puts the top ten
cards of their library into their graveyard.
Equip {3}
Insanity {1}{u}{b}