Is Cradle Guard legal in Standard, Modern, and Commander?

Cradle Guard is legal in: Legacy, Vintage, Commander.

Cradle Guard

Q: What type of card is Cradle Guard?

Cradle Guard is a Creature — Treefolk. Its oracle text reads: "Trample Echo {1}{G}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)"

Creature — Treefolk

Trample

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Set Urza's Saga

Rarity Uncommon

Mana Value 3

Artist Mark Zug

Collector # 245

Scryfall Gatherer