(: Add or to your mana pool.)
Obsidian Chamber enters the battlefield tapped.
, , Pay 1 life: Put a 1/1 black Skeleton creature token onto the battlefield.
, , Sacrifice Obsidian Chamber: Return target creature you control to its owner's hand.
: Add 
or 
to your mana pool.), , Pay 1 life: Put a 1/1 black Skeleton creature token onto the battlefield., , Sacrifice Obsidian Chamber: Return target creature you control to its owner's hand.
