産卵池/Spawning Pool

Land -
Spawning Pool enters the battlefield tapped. <CR>
{T}: Add {B} to your mana pool. <CR>
{1}{B}: 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.)

Land -
Spawning Pool enters the battlefield tapped. <CR>
{T}: Add {B}. <CR>
{1}{B}: 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.)

Land -
Spawning Pool comes into play tapped. <CR>
{T}: Add {B} to your mana pool. <CR>
{1}{B}: 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.)

Land -
Spawning Pool enters the battlefield tapped. <CR>
{T}: Add {B} to your mana pool. <CR>
{1}{B}: 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.)

Land -
Spawning Pool comes into play tapped. <CR>
{T}: Add {B} to your mana pool. <CR>
{1}{B}: Spawning Pool becomes a 1/1 black creature with "{B}: Regenerate this creature" until end of turn. It's still a land.

Land -
Spawning Pool comes into play tapped. <CR>
{T}: Add {B} to your mana pool. <CR>
{1}{B}: 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.)