Is Might of the Meek legal in Standard, Modern, and Commander?

Might of the Meek is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Might of the Meek

Q: What type of card is Might of the Meek?

Might of the Meek is an Instant. Its oracle text reads: "Target creature gains trample until end of turn. It also gets +1/+0 until end of turn if you control a Mouse. Draw a card. *"Fear is unavoidable. You can run from it with your tail between your legs, or charge it head on with sword in hand. I prefer the latter." —Rho, veteran hero*"