Is Gitrog, Horror of Zhava legal in Standard, Modern, and Commander?

Gitrog, Horror of Zhava is legal in: Historic.

Gitrog, Horror of Zhava

Q: What type of card is Gitrog, Horror of Zhava?

Gitrog, Horror of Zhava is a Legendary Creature — Frog Horror. Its oracle text reads: "Menace At the beginning of each combat, if Gitrog, Horror of Zhava is untapped, any opponent may sacrifice a nontoken creature. If they do, tap Gitrog, Horror of Zhava, then seek a land card and put it onto the battlefield tapped. Whenever a land enters under your control, it perpetually gains "{B}{G}, {T}, Sacrifice this land: Draw a card." Power/Toughness: 6/6"

Legendary Creature — Frog Horror

Menace

At the beginning of each combat, if Gitrog, Horror of Zhava is untapped, any opponent may sacrifice a nontoken creature. If they do, tap Gitrog, Horror of Zhava, then seek a land card and put it onto the battlefield tapped.

Whenever a land enters under your control, it perpetually gains ", , Sacrifice this land: Draw a card."