Is Kappa Cannoneer legal in Standard, Modern, and Commander?

Kappa Cannoneer is legal in: Modern, Legacy, Vintage, Commander, Historic.

Kappa Cannoneer

Q: What type of card is Kappa Cannoneer?

Kappa Cannoneer is an Artifact Creature — Turtle Warrior. Its oracle text reads: "Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Ward {4} Whenever this creature or another artifact you control enters, put a +1/+1 counter on this creature. It can't be blocked this turn."