Obsidian Sandbar
Artifact Land (Rare)

(Obsidian Sandbar isn't a spell.)

Obsidian Sandbar enters the battlefield tapped unless you control two or more creatures.

Obsidian Sandbar is indestructible. (Destroy effects and lethal damage don't destroy it.)

B, Tap: Add UU to your mana pool.

U, Tap: Add BB to your mana pool.

Eric Argyle