Is Witherscale Wurm legal in Standard, Modern, and Commander?

Witherscale Wurm is legal in: Modern, Legacy, Vintage, Commander.

Witherscale Wurm

Q: What type of card is Witherscale Wurm?

Witherscale Wurm is a Creature — Wurm. Its oracle text reads: "Whenever this creature blocks or becomes blocked by a creature, that creature gains wither until end of turn. (It deals damage to creatures in the form of -1/-1 counters.) Whenever this creature deals damage to an opponent, remove all -1/-1 counters from it. Power/Toughness: 9/9"

Creature — Wurm

Whenever this creature blocks or becomes blocked by a creature, that creature gains wither until end of turn. (It deals damage to creatures in the form of -1/-1 counters.)

Whenever this creature deals damage to an opponent, remove all -1/-1 counters from it.

Power/Toughness: 9/9

Set Shadowmoor

Rarity Rare

Mana Value 6

Artist Thomas M. Baxa

Collector # 134

Scryfall