(: Add or to your mana pool.)
When Obsidian-works enters the battlefield, you lose 1 life unless you reveal a monocolored card from your hand.
, , Sacrifice Obsidian-works: Put a -1/-1 counter on target creature.
, : Scry 2.
: Add 
or 
to your mana pool.), , Sacrifice Obsidian-works: Put a -1/-1 counter on target creature.
, : Scry 2.
