exiled Y'alma

Instant and sorcery spells you cast cost {1} less to
cast.
{t}:Add {g}{b} to your mana pool. Spend this mana
only to cast creature spells.
{b/g}{g}{b}, Discard a non creature card, Pay 2 life: You
may return target creature card from your
graveyard to the battlefield. Put a +1/+1 counter
and a Y'alma mark on that creature. Whenever
a creature you control with a Y'alma mark dies or
has no counters on it, exile it.
"This is the price of exile"