(: Add or to your mana pool.)
At the beginning of your upkeep, Rotting Seafloor deals 1 damage to target creature you control.
: Rotting Seafloor becomes a 2/1 black and blue Skeleton creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Rotting Seafloor becomes a 2/1 black and blue Skeleton creature until end of turn. It's still a land.
