Is Elusive Krasis legal in Standard, Modern, and Commander?

Elusive Krasis is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Elusive Krasis

Q: What type of card is Elusive Krasis?

Elusive Krasis is a Creature — Fish Mutant. Its oracle text reads: "This creature can't be blocked. 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.)"

Creature — Fish Mutant

This creature can't be blocked.

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.)

Set Gatecrash

Rarity Uncommon

Mana Value 3

Artist Wesley Burt

Collector # 160

Scryfall Gatherer