Is Simic Fluxmage legal in Standard, Modern, and Commander?

Simic Fluxmage is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Simic Fluxmage

Q: What type of card is Simic Fluxmage?

Simic Fluxmage is a Creature — Merfolk Wizard. Its oracle text reads: "Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.) {1}{U}, {T}: Move a +1/+1 counter from this creature onto target creature."

Creature — Merfolk Wizard

Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

, : Move a +1/+1 counter from this creature onto target creature.