(: Add or to your mana pool.)
Keldon Pool enters the battlefield tapped unless you pay .
: Keldon Pool becomes a 2/1 red and black Giant Elemental creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.).: Keldon Pool becomes a 2/1 red and black Giant Elemental creature until end of turn. It's still a land.
