Is Chimeric Egg legal in Standard, Modern, and Commander?

Chimeric Egg is legal in: Modern, Legacy, Vintage, Commander.

Chimeric Egg

Q: What type of card is Chimeric Egg?

Chimeric Egg is an Artifact. Its oracle text reads: "Whenever an opponent casts a nonartifact spell, put a charge counter on this artifact. Remove three charge counters from this artifact: This artifact becomes a 6/6 Construct artifact creature with trample until end of turn."