Is Hammerheim Deadeye legal in Standard, Modern, and Commander?

Hammerheim Deadeye is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Hammerheim Deadeye

Q: What type of card is Hammerheim Deadeye?

Hammerheim Deadeye is a Creature — Giant Warrior. Its oracle text reads: "Echo {5}{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, destroy target creature with flying."

Creature — Giant Warrior

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.)