Is Umori, the Collector legal in Standard, Modern, and Commander?

Umori, the Collector is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Umori, the Collector

Q: What type of card is Umori, the Collector?

Umori, the Collector is a Legendary Creature — Ooze. Its oracle text reads: "Companion — Each nonland card in your starting deck shares a card type. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.) As Umori enters, choose a card type. Spells you cast of the chosen type cost {1} less to cast."

Legendary Creature — Ooze

$0.34 ↗20 similarCommander, Modern

Companion — Each nonland card in your starting deck shares a card type. (If this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery.)