Is Emergent Woodwurm legal in Standard, Modern, and Commander?

Emergent Woodwurm is legal in: Legacy, Vintage, Commander.

Emergent Woodwurm

Q: What type of card is Emergent Woodwurm?

Emergent Woodwurm is a Creature — Wurm. Its oracle text reads: "Backup 3 (When this creature enters, put three +1/+1 counters on target creature. If that's another creature, it gains the following ability until end of turn.) Whenever this creature attacks, look at the top X cards of your library, where X is its power. You may put a permanent card with mana value X or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order."

Creature — Wurm

Backup 3 (When this creature enters, put three +1/+1 counters on target creature. If that's another creature, it gains the following ability until end of turn.)

Whenever this creature attacks, look at the top X cards of your library, where X is its power. You may put a permanent card with mana value X or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.

Set March of the Machine Commander

Rarity Rare

Mana Value 7

Artist Mathias Kollros

Collector # 37

Scryfall Gatherer