Is Spawning Pool legal in Standard, Modern, and Commander?

Spawning Pool is legal in: Modern, Legacy, Vintage, Commander.

Spawning Pool

Q: What type of card is Spawning Pool?

Spawning Pool is a Land. Its oracle text reads: "This land enters tapped. {T}: Add {B}. {1}{B}: This land 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, instead tap it, remove it from combat, and heal all damage on it.)"

Land

This land enters tapped.

: Add .

: This land becomes a 1/1 black Skeleton creature with ": Regenerate this creature" until end of turn. It's still a land. (If it regenerates, the next time it would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)