Is Daru Stinger legal in Standard, Modern, and Commander?

Daru Stinger is legal in: Legacy, Vintage, Commander, Pauper.

Daru Stinger

Q: What type of card is Daru Stinger?

Daru Stinger is a Creature — Soldier. Its oracle text reads: "Amplify 1 (As this creature enters, put a +1/+1 counter on it for each Soldier card you reveal in your hand.) {T}: This creature deals damage equal to the number of +1/+1 counters on it to target attacking or blocking creature."