When River Palace enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool.
: Add to your mana pool. Put River Palace on top of your library.
Cycling (, Discard this card: Draw a card.)
.
: Add or 
to your mana pool.: Add 
to your mana pool. Put River Palace on top of your library. (, Discard this card: Draw a card.)
