Drill-X is a massive, robotic drilling machine encountered in the 'Drill-X's Big Rig' chapter. He has three main phases. Phase 1: Drill-X will charge around the arena, attempting to ram your Skylander. Dodge his charges and wait for him to get stuck in the wall. When he's momentarily stunned, attack his exposed drill arm. He will also launch smaller drills that can be destroyed for health. Phase 2: He'll start firing rockets and summoning smaller robotic enemies. Focus on dodging the rockets and clearing the adds quickly. Continue to attack his drill arm when he's stunned. Phase 3: Drill-X will become more aggressive, combining his previous attacks. His weak point remains the drill arm. A Tech Skylander can deal bonus damage here. Keep moving, prioritize dodging, and chip away at his health. Reward: A large amount of gold and a Legendary Treasure.
