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

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

Changeling Titan

Q: What type of card is Changeling Titan?

Changeling Titan 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.)"

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.)

Set Lorwyn

Rarity Uncommon

Mana Value 5

Artist Jesper Ejsing

Collector # 200

Scryfall Gatherer