When Breeding Tomb enters the battlefield, return a land you control to its owner's hand.
: Add or to your mana pool.
Put Breeding Tomb on top of your library: Add to your mana pool.
, , Sacrifice Breeding Tomb: Destroy target monocolored permanent.
: Add 
or 
to your mana pool.
to your mana pool. 
, , Sacrifice Breeding Tomb: Destroy target monocolored permanent.
