Spawning Pool [Tenth Edition]

Spawning Pool enters the battlefield tapped.
T: Add B.
1B: Spawning Pool becomes a 1/1 black Skeleton creature with "B: Regenerate this creature" until end of turn. It's still a land. (If it regenerates, the next time it would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)