Dragonskull Crater enters the battlefield tapped.
: Add or to your mana pool.
Put Dragonskull Crater on top of your library: Add to your mana pool.
, , Sacrifice Dragonskull Crater: Destroy target Black permanent.
: Add 
or 
to your mana pool.
to your mana pool. 
, , Sacrifice Dragonskull Crater: Destroy target Black permanent.
