Obsidian Mountain enters the battlefield tapped.
: Add or to your mana pool.
Put Obsidian Mountain on top of your library: Add to your mana pool.
, : Target Elemental gets +2/+0 until end of turn.
: Add 
or 
to your mana pool.
to your mana pool. , : Target Elemental gets +2/+0 until end of turn.
