Is Paradox Zone legal in Standard, Modern, and Commander?

Paradox Zone is legal in: Legacy, Vintage, Commander.

Paradox Zone

Q: What type of card is Paradox Zone?

Paradox Zone is an Enchantment. Its oracle text reads: "This enchantment enters with a growth counter on it. At the beginning of your end step, double the number of growth counters on this enchantment. Then create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is the number of growth counters on this enchantment."

Enchantment

This enchantment enters with a growth counter on it.

At the beginning of your end step, double the number of growth counters on this enchantment. Then create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is the number of growth counters on this enchantment.

Set Commander 2021

Rarity Rare

Mana Value 5

Artist Ryan Yee

Collector # 64

Scryfall