Is Gideon, the Oathsworn legal in Standard, Modern, and Commander?

Gideon, the Oathsworn is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Gideon, the Oathsworn

Q: What type of card is Gideon, the Oathsworn?

Gideon, the Oathsworn is a Legendary Planeswalker — Gideon. Its oracle text reads: "Whenever you attack with two or more non-Gideon creatures, put a +1/+1 counter on each of those creatures. +2: Until end of turn, Gideon becomes a 5/5 white Soldier creature that's still a planeswalker. Prevent all damage that would be dealt to him this turn. (He can't attack if he was cast this turn.) −9: Exile Gideon and each creature your opponents control."

Legendary Planeswalker — Gideon

Whenever you attack with two or more non-Gideon creatures, put a +1/+1 counter on each of those creatures.

+2: Until end of turn, Gideon becomes a 5/5 white Soldier creature that's still a planeswalker. Prevent all damage that would be dealt to him this turn. (He can't attack if he was cast this turn.)

−9: Exile Gideon and each creature your opponents control.

Set War of the Spark

Rarity Mythic Rare

Mana Value 6

Artist Kieran Yanner

Collector # 265

Scryfall