River Caves enters the battlefield tapped.
: Add or to your mana pool.
: Add to your mana pool. Put River Caves on top of your library.
, : Exile target basic land, then return it to the battlefield under its owner's control.
: Add 
or 
to your mana pool.: Add 
to your mana pool. Put River Caves on top of your library.
, : Exile target basic land, then return it to the battlefield under its owner's control.
