Obsidian Meadow enters the battlefield tapped unless you control an enchantment.
: Add or to your mana pool.
Put Obsidian Meadow on top of your library: Add to your mana pool.
: Return Obsidian Meadow to its owner's hand.
: Add 
or 
to your mana pool.
to your mana pool. : Return Obsidian Meadow to its owner's hand.
