When Leechridden Foundry enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool.
Sacrifice Leechridden Foundry: Add or to your mana pool.
, Sacrifice Leechridden Foundry: Add to your mana pool.
.
: Add 
or to your mana pool. or to your mana pool., Sacrifice Leechridden Foundry: Add 
to your mana pool.
