Is Sawtooth Thresher legal in Standard, Modern, and Commander?

Sawtooth Thresher is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Sawtooth Thresher

Q: What type of card is Sawtooth Thresher?

Sawtooth Thresher is an Artifact Creature — Construct. Its oracle text reads: "Sunburst (This enters with a +1/+1 counter on it for each color of mana spent to cast it.) Remove two +1/+1 counters from this creature: It gets +4/+4 until end of turn. Power/Toughness: 1/1"