Kyuss, The Worm that Walks

Trample, Deathtouch
When Kyuss deals combat damage to a player,
you may return target creature card from your graveyard
to the battlefield tapped.
If you do, put a -1/-1 counter on Kyuss.
At the beggining of your upkeep,
if there are ten or more creature cards
in your graveyard, exile your graveyard.
If you do, remove all -1/-1 counters from Kyuss
and put an indestructable counter on it.