Is Changeling Hero legal in Standard, Modern, and Commander?

Changeling Hero is legal in: Modern, Legacy, Vintage, Commander.

Changeling Hero

Q: What type of card is Changeling Hero?

Changeling Hero is a Creature — Shapeshifter. Its oracle text reads: "Changeling (This card is every creature type.) Champion a creature (When this enters, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.) Lifelink (Damage dealt by this creature also causes you to gain that much life.)"

Creature — Shapeshifter

Changeling (This card is every creature type.)

Champion a creature (When this enters, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.)

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Set Lorwyn

Rarity Uncommon

Mana Value 5

Artist Jeff Miracola

Collector # 9

Scryfall Gatherer