Is Barbed-Back Wurm legal in Standard, Modern, and Commander?

Barbed-Back Wurm is legal in: Legacy, Vintage, Commander.

What type of card is Barbed-Back Wurm?

Barbed-Back Wurm is a Creature — Wurm. Its oracle text reads: "{B}: Target green creature blocking Barbed-Back Wurm gets -1/-1 until end of turn."

Creature — Wurm

: Target green creature blocking Barbed-Back Wurm gets -1/-1 until end of turn.

Set Mirage

Rarity Uncommon

Artist Gary Leach

Creature Commander Legacy Vintage