Is Back-Alley Gardener legal in Standard, Modern, and Commander?

Back-Alley Gardener is legal in: Historic.

Back-Alley Gardener

Q: What type of card is Back-Alley Gardener?

Back-Alley Gardener is a Creature — Elf Druid. Its oracle text reads: "Alliance — Whenever one or more other creatures enter the battlefield under your control, seek a land card, then put it onto the battlefield tapped. This ability triggers only once each turn. Power/Toughness: 3/4"

Creature — Elf Druid

Alliance — Whenever one or more other creatures enter the battlefield under your control, seek a land card, then put it onto the battlefield tapped. This ability triggers only once each turn.

Power/Toughness: 3/4

Set Alchemy: New Capenna

Rarity Mythic Rare

Mana Value 3

Artist Francisco Miyara

Collector # 17

Scryfall