Tainted Bog

Whenever a permanent is put into a graveyard from play, Tainted Bog gets +1/+1 until end of turn. Sacrifice a non-token permanent: Choose 1- -Tainted Bog gains deathtouch until end of turn. -Regenerate Tainted Bog. Sacrifice all other non-land permanents you control: Return all permanents from all opponents graveyards to the battlefield under your control. Activate this ability only if Tainted Bog has power 12 or greater.