Foundry Seafloor enters the battlefield tapped.
: Add or to your mana pool.
Sacrifice Foundry Seafloor: Add or to your mana pool.
: Foundry Seafloor becomes a 2/1 red and blue Beast creature until end of turn. It's still a land.
: Add 
or 
to your mana pool. or to your mana pool.: Foundry Seafloor becomes a 2/1 red and blue Beast creature until end of turn. It's still a land.
