(: Add or to your mana pool.)
When Obsidian Mesa enters the battlefield, sacrifice it unless you pay 2 life.
: Obsidian Mesa becomes a 2/2 red Orc creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
: Obsidian Mesa becomes a 2/2 red Orc creature until end of turn. It's still a land.
