Cairo, Necromancer of Time

When Cairo enters the battlefield
choose a card from your hand put it
on to the battlefield without paying its mana cost
when that card enters the
battlefield exile it instead
with three suspend counters on it.
{t} Sacrifice a creature: Search your library
for a creature with converted mana cost {x} or
less where {x} is 3 plus the sacrificed creature's
converted mana cost.