Is Kaseto, Orochi Archmage legal in Standard, Modern, and Commander?

Kaseto, Orochi Archmage is legal in: Legacy, Vintage, Commander.

Kaseto, Orochi Archmage

Q: What type of card is Kaseto, Orochi Archmage?

Kaseto, Orochi Archmage is a Legendary Creature — Snake Wizard. Its oracle text reads: "{G}{U}: Target creature can't be blocked this turn. If that creature is a Snake, it gets +2/+2 until end of turn. *"Our revered ancestor Seshiro gave us wisdom greater than poison and fangs."* Power/Toughness: 2/2"