Abyssbell, Jashin Emperor

Menace
You may cast black creature spells from your graveyard. If you do, it gains haste until end of turn. When that creature would leave the battlefield it returns to the bottom of your library instead.
Creature spells you cast from graveyard cost {2} less to cast.
When Abyssbell, Jashin Emperor would leave the battlefield, you may discard two cards instead.