When Rot Megaliths enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool.
: Add to your mana pool. Put Rot Megaliths on top of your library.
, Sacrifice Rot Megaliths: Add to your mana pool.
.
: Add or 
to your mana pool.: Add 
to your mana pool. Put Rot Megaliths on top of your library., Sacrifice Rot Megaliths: Add to your mana pool.
