Forbidden Spellbook

Creature spells you cast cost {1} less to cast
Spells your opponents cast cost {1} more to cast
whenever your opponents cast a spell put a
counter on Forbidden Spellbook and
you lose 1 life. Sacrifice
Forbidden Spellbook when there are 5 counters
on it, search your library for a creature card with
mana cost 5 or greater put onto the battlefield.
Put forbidden Spellbook back onto
the battlefield under opponents control with no counters on it.