Is Grim Poppet legal in Standard, Modern, and Commander?

Grim Poppet is legal in: Modern, Legacy, Vintage, Commander.

Grim Poppet

Q: What type of card is Grim Poppet?

Grim Poppet is an Artifact Creature — Scarecrow. Its oracle text reads: "This creature enters with three -1/-1 counters on it. Remove a -1/-1 counter from this creature: Put a -1/-1 counter on another target creature. *Beware a scarecrow bearing gifts—especially sloshing vessels of acid.* Power/Toughness: 4/4"