Alma Soulkeeper

When Alma Soulkeeper enters to the battlefield
create X 2/2 black zombie creature tokens.
Whenever any creature or token dies on the battlefield you may pay {1} and create a 2/2 black zombie creature token.
{t}Target instant or sorcery card target graveyard
has flashback until end of turn.(you may cast that
card from that graveyard for its flashback cost.
Then exile it)