(: Add or to your mana pool.)
Flat Seafloor enters the battlefield tapped.
, , Sacrifice Flat Seafloor: Prevent all combat damage that would be dealt this turn.
, , Sacrifice Flat Seafloor: Return target creature you control to its owner's hand.
: Add 
or 
to your mana pool.), , Sacrifice Flat Seafloor: Prevent all combat damage that would be dealt this turn., , Sacrifice Flat Seafloor: Return target creature you control to its owner's hand.
