Aceerereek the archlick

When Aceerereek the archlick enters
the battlefield, return it to your hand if
you dont control Acererak the archlich,
then search you library or graveyard
for a card named Acererak the archlich
and put it into your hand.
"Only some know of Acererak's more deadly cousin Aceereree... but those that do dont last
long"