Is _____-o-saurus legal in Standard, Modern, and Commander?

_____-o-saurus is legal in: Commander. It is banned in: Legacy, Vintage, Pauper.

_____-o-saurus

Q: What type of card is _____-o-saurus?

_____-o-saurus is a Creature — Alien Dinosaur. Its oracle text reads: "Trample When this creature enters, you may put a name sticker on it. Put a +1/+1 counter on it for each unique vowel on that sticker. (The vowels are A, E, I, O, U, and Y.) *"Petting in the petting zoo is not advised." —Astrotorium waiver* Power/Toughness: 3/3"

Creature — Alien Dinosaur

Trample

When this creature enters, you may put a name sticker on it. Put a +1/+1 counter on it for each unique vowel on that sticker. (The vowels are A, E, I, O, U, and Y.)

*"Petting in the petting zoo is not advised."

—Astrotorium waiver*

Power/Toughness: 3/3

Set Unfinity

Rarity Common

Mana Value 6

Artist Leonardo Santanna

Collector # 148

Scryfall