Is Bretagard Stronghold legal in Standard, Modern, and Commander?

Bretagard Stronghold is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Bretagard Stronghold

Q: What type of card is Bretagard Stronghold?

Bretagard Stronghold is a Land. Its oracle text reads: "This land enters tapped. {T}: Add {G}. {G}{W}{W}, {T}, Sacrifice this land: Put a +1/+1 counter on each of up to two target creatures you control. They gain vigilance and lifelink until end of turn. Activate only as a sorcery."

Land

This land enters tapped.

: Add .

, , Sacrifice this land: Put a +1/+1 counter on each of up to two target creatures you control. They gain vigilance and lifelink until end of turn. Activate only as a sorcery.