Is Pouncing Jaguar legal in Standard, Modern, and Commander?

Pouncing Jaguar is legal in: Legacy, Vintage, Commander, Pauper.

Pouncing Jaguar

Q: What type of card is Pouncing Jaguar?

Pouncing Jaguar is a Creature — Cat. Its oracle text reads: "Echo {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 — Cat

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 Common

Mana Value 1

Artist Daren Bader

Collector # 269

Scryfall Gatherer