Is Gyre Sage legal in Standard, Modern, and Commander?

Gyre Sage is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Gyre Sage

Q: What type of card is Gyre Sage?

Gyre Sage is a Creature — Elf Druid. 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.) {T}: Add {G} for each +1/+1 counter on this creature."

Creature — Elf Druid

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.)

: Add for each +1/+1 counter on this creature.