Is Repel Intruders legal in Standard, Modern, and Commander?

Repel Intruders is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Repel Intruders?

Repel Intruders is an Instant. Its oracle text reads: "Create two 1/1 white Kithkin Soldier creature tokens if {W} was spent to cast this spell. Counter up to one target creature spell if {U} was spent to cast this spell. (Do both if {W}{U} was spent.)"

Repel Intruders

Instant

Create two 1/1 white Kithkin Soldier creature tokens if was spent to cast this spell. Counter up to one target creature spell if was spent to cast this spell. (Do both if was spent.)