Is Subterranean Shambler legal in Standard, Modern, and Commander?

Subterranean Shambler is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Subterranean Shambler

Q: What type of card is Subterranean Shambler?

Subterranean Shambler is a Creature — Elemental. Its oracle text reads: "Echo {3}{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.) When this creature enters or leaves the battlefield, it deals 1 damage to each creature without flying."

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.)

When this creature enters or leaves the battlefield, it deals 1 damage to each creature without flying.

Set Time Spiral

Rarity Common

Mana Value 4

Artist Kev Walker

Collector # 178

Scryfall Gatherer