(: Add or to your mana pool.)
When Obsidian Gorge enters the battlefield, sacrifice it unless you pay .
, Sacrifice Obsidian Gorge: Obsidian Gorge deals 1 damage to target creature or player.
: Add 
or 
to your mana pool.)., Sacrifice Obsidian Gorge: Obsidian Gorge deals 1 damage to target creature or player.
