Is Chitterspitter legal in Standard, Modern, and Commander?

Chitterspitter is legal in: Modern, Legacy, Vintage, Commander, Historic.

Chitterspitter

Q: What type of card is Chitterspitter?

Chitterspitter is an Artifact. Its oracle text reads: "At the beginning of your upkeep, you may sacrifice a token. If you do, put an acorn counter on this artifact. Squirrels you control get +1/+1 for each acorn counter on this artifact. {G}, {T}: Create a 1/1 green Squirrel creature token."