Is Hired Claw legal in Standard, Modern, and Commander?

Hired Claw is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Hired Claw?

Hired Claw is a Creature — Lizard Mercenary. Its oracle text reads: "Whenever you attack with one or more Lizards, this creature deals 1 damage to target opponent. {1}{R}: Put a +1/+1 counter on this creature. Activate only if an opponent lost life this turn and only once each turn. Power/Toughness: 1/2"