Rotting Knoll enters the battlefield tapped unless you reveal a multicolored card from your hand.
: Add or to your mana pool.
: Add to your mana pool. Put Rotting Knoll on top of your library.
: Return Rotting Knoll to its owner's hand.
: Add 
or 
to your mana pool.: Add 
to your mana pool. Put Rotting Knoll on top of your library.: Return Rotting Knoll to its owner's hand.
