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

A-Bretagard Stronghold is legal in: Historic.

A-Bretagard Stronghold

Q: What type of card is A-Bretagard Stronghold?

A-Bretagard Stronghold is a Land. Its oracle text reads: "Bretagard Stronghold enters tapped. {T}: Add {G}. {G}{W}{W}, {T}, Sacrifice Bretagard Stronghold: Distribute two +1/+1 counters among one or two target creatures you control. They gain vigilance and lifelink until end of turn. Activate only as a sorcery."

Land

Bretagard Stronghold enters tapped.

: Add .

, , Sacrifice Bretagard Stronghold: Distribute two +1/+1 counters among one or two target creatures you control. They gain vigilance and lifelink until end of turn. Activate only as a sorcery.