Oracle Text

Artifact Creature — Knight

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.