When Calciform Slagheap enters the battlefield, return a land you control to its owner's hand.
: Add or to your mana pool.
: Add to your mana pool. Put Calciform Slagheap on top of your library.
, Sacrifice Calciform Slagheap: Add to your mana pool.
: Add 
or 
to your mana pool.: Add 
to your mana pool. Put Calciform Slagheap on top of your library., Sacrifice Calciform Slagheap: Add to your mana pool.
