When Krosan Keep enters the battlefield, return a land you control to its owner's hand.
: Add or to your mana pool.
Sacrifice Krosan Keep: Add or to your mana pool.
, Sacrifice Krosan Keep: Target creature gets +2/+2 until end of turn.
: Add 
or 
to your mana pool. or to your mana pool., Sacrifice Krosan Keep: Target creature gets +2/+2 until end of turn.
