Is Kongming's Contraptions legal in Standard, Modern, and Commander?

Kongming's Contraptions is legal in: Legacy, Vintage, Commander.

Kongming's Contraptions

Q: What type of card is Kongming's Contraptions?

Kongming's Contraptions is a Creature — Human Soldier. Its oracle text reads: "{T}: This creature deals 2 damage to target attacking creature. Activate only during the declare attackers step and only if you've been attacked this step."

Creature — Human Soldier

: This creature deals 2 damage to target attacking creature. Activate only during the declare attackers step and only if you've been attacked this step.