Is Thicket Elemental legal in Standard, Modern, and Commander?

Thicket Elemental is legal in: Legacy, Vintage, Commander.

Thicket Elemental

Q: What type of card is Thicket Elemental?

Thicket Elemental is a Creature — Elemental. Its oracle text reads: "Kicker {1}{G} (You may pay an additional {1}{G} as you cast this spell.) When this creature enters, if it was kicked, you may reveal cards from the top of your library until you reveal a creature card. If you do, put that card onto the battlefield and shuffle all other cards revealed this way into your library."

Creature — Elemental

Kicker (You may pay an additional as you cast this spell.)

When this creature enters, if it was kicked, you may reveal cards from the top of your library until you reveal a creature card. If you do, put that card onto the battlefield and shuffle all other cards revealed this way into your library.

Set Duel Decks: Nissa vs. Ob Nixilis

Rarity Rare

Mana Value 5

Artist Ron Spencer

Collector # 21

Scryfall Gatherer