Whenever Underground Seafloor becomes tapped, it deals 1 damage to you.
, : Add to your mana pool.
: Underground Seafloor becomes a 2/2 black Skeleton Rogue creature until end of turn. It's still a land.
, 
: Add 
to your mana pool., : Add to your mana pool.
: Underground Seafloor becomes a 2/2 black Skeleton Rogue creature until end of turn. It's still a land.
