Number 57: Tri-Head Dust Dragon (NUMH-EN030)

3 Level 4 monsters

When this card is Special Summoned: You can target 1 monster your opponent controls; this card gains ATK equal to that monster's current ATK. If your opponent controls more cards than you do: You can detach 1 Xyz Material from this card, then choose 1 unused Main Monster Zone or Spell & Trap Zone; while this card is face-up on the field, that zone cannot be used.

Dragon / Xyz / Effect, Number Hunters