Is Rukarumel, Biologist legal in Standard, Modern, and Commander?

Rukarumel, Biologist is legal in: Legacy, Vintage, Commander.

Rukarumel, Biologist

Q: What type of card is Rukarumel, Biologist?

Rukarumel, Biologist is a Legendary Creature — Human Wizard. Its oracle text reads: "As Rukarumel enters, choose a creature type. Slivers you control and nontoken creatures you control are the chosen type in addition to their other creature types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield. {3}, {T}: Create a 1/1 colorless Sliver creature token."

Legendary Creature — Human Wizard

As Rukarumel enters, choose a creature type.

Slivers you control and nontoken creatures you control are the chosen type in addition to their other creature types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

, : Create a 1/1 colorless Sliver creature token.