(: Add or to your mana pool.)
Mistveil Seafloor enters the battlefield tapped.
, , Sacrifice Mistveil Seafloor: Prevent all combat damage that would be dealt this turn.
, : Counter target spell unless its controller pays .
: Add 
or 
to your mana pool.), , Sacrifice Mistveil Seafloor: Prevent all combat damage that would be dealt this turn.
, : Counter target spell unless its controller pays .
