Is Strangleroot Geist legal in Standard, Modern, and Commander?

Strangleroot Geist is legal in: Modern, Legacy, Vintage, Commander.

Strangleroot Geist

Q: What type of card is Strangleroot Geist?

Strangleroot Geist is a Creature — Spirit. Its oracle text reads: "Haste Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)"

Creature — Spirit

Haste

Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Set Dark Ascension

Rarity Uncommon

Mana Value 2

Artist Jason Chan

Collector # 127

Scryfall Gatherer