Is Agrus Kos, Eternal Soldier legal in Standard, Modern, and Commander?

Agrus Kos, Eternal Soldier is legal in: Legacy, Vintage, Commander.

What type of card is Agrus Kos, Eternal Soldier?

Agrus Kos, Eternal Soldier is a Legendary Creature — Spirit Soldier. Its oracle text reads: "Vigilance Whenever Agrus Kos becomes the target of an ability that targets only it, you may pay {1}{R/W}. If you do, copy that ability for each other creature you control that ability could target. Each copy targets a different one of those creatures. ({R/W} can be paid with either {R} or {W}.) Power/Toughness: 3/4"

Agrus Kos, Eternal Soldier

Legendary Creature — Spirit Soldier

Vigilance

Whenever Agrus Kos becomes the target of an ability that targets only it, you may pay . If you do, copy that ability for each other creature you control that ability could target. Each copy targets a different one of those creatures. ( can be paid with either or .)