(: Add or to your mana pool.)
When Obsidian Glen enters the battlefield, return a land you control to its owner's hand.
: Obsidian Glen becomes a 2/1 black and blue Specter creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Obsidian Glen becomes a 2/1 black and blue Specter creature until end of turn. It's still a land.
