Cthulhu, Dead but Dreaming

Defender, flying
Whenever a creature becomes blocked by Cthulhu, Dead but Dreaming, put 6 -1/-1 counters on it.
{x},{t}: Exile the top X cards of target player's library, that player discards half X cards and loses half X life.
If Cthulhu, Dead but Dreaming would be put into a graveyard from anywhere, put it into its owner's hand instead.