Is Peri Brown legal in Standard, Modern, and Commander?

Peri Brown is legal in: Legacy, Vintage, Commander.

What type of card is Peri Brown?

Peri Brown is a Legendary Creature — Human. Its oracle text reads: "The first historic spell you cast each turn has convoke. (Your creatures can help cast it. Each creature you tap while casting it pays for {1} or one mana of that creature's color.) Doctor's companion (You can have two commanders if the other is the Doctor.) *"I'm Perpugilliam Brown and I can shout just as loud as you can!"* Power/Toughness: 2/3"

Peri Brown

Legendary Creature — Human

The first historic spell you cast each turn has convoke. (Your creatures can help cast it. Each creature you tap while casting it pays for or one mana of that creature's color.)