Is Timber Paladin legal in Standard, Modern, and Commander?

Timber Paladin is legal in: Legacy, Vintage, Commander.

Timber Paladin

Q: What type of card is Timber Paladin?

Timber Paladin is an Artifact Creature — Knight. Its oracle text reads: "As long as this creature is enchanted by exactly one Aura, it has base power and toughness 3/3. As long as this creature is enchanted by exactly two Auras, it has base power and toughness 5/5 and vigilance. As long as this creature is enchanted by three or more Auras, it has base power and toughness 10/10, vigilance, and trample. Power/Toughness: 1/1"