Is Shambleshark legal in Standard, Modern, and Commander?

Shambleshark is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Shambleshark

Q: What type of card is Shambleshark?

Shambleshark is a Creature — Shark Crab. Its oracle text reads: "Flash (You may cast this spell any time you could cast an instant.) Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.) Power/Toughness: 2/1"

Creature — Shark Crab

Flash (You may cast this spell any time you could cast an instant.)

Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

Power/Toughness: 2/1

Set Gatecrash

Rarity Common

Mana Value 2

Artist Wesley Burt

Collector # 193

Scryfall