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

Flamecore Elemental is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Flamecore Elemental

Q: What type of card is Flamecore Elemental?

Flamecore Elemental is a Creature — Elemental. Its oracle text reads: "Echo {2}{R}{R} (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 — Elemental

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 Time Spiral

Rarity Common

Mana Value 4

Artist Dave Dorman

Collector # 154

Scryfall Gatherer