Is Elvish Vatkeeper legal in Standard, Modern, and Commander?

Elvish Vatkeeper is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Elvish Vatkeeper?

Elvish Vatkeeper is a Creature — Phyrexian Elf. Its oracle text reads: "When this creature enters, incubate 2. (Create an Incubator token with two +1/+1 counters on it and "{2}: Transform this token." It transforms into a 0/0 Phyrexian artifact creature.) {5}: Transform target Incubator token you control. Double the number of +1/+1 counters on it."

Elvish Vatkeeper

Creature — Phyrexian Elf

When this creature enters, incubate 2. (Create an Incubator token with two +1/+1 counters on it and ": Transform this token." It transforms into a 0/0 Phyrexian artifact creature.)