Obsidian Burrows enters the battlefield tapped unless you sacrifice a creature.
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
, , Sacrifice Obsidian Burrows: Destroy target Horror Specter.
: Add 
to your mana pool. If you played a land this turn, Add 
to your mana pool instead.
, , Sacrifice Obsidian Burrows: Destroy target Horror Specter.
