The Army of the dead

Erik's plants erupted from the ground, powered by the fury he was feeling for having lost the plane. With nothing to protect, his attacks focused on the enemy in front of him. The metallic-plant tendrils whipped through the air, forcing Bill to dodge while his invisible hands destroyed them.

"Feeling better now that you destroyed the plane?" Erik asked in cold anger. 

The elementalist launched another massive fireball, but Erik protected himself by making thousands of tendrils of metallic plants sprout in front of him.

The metal liquefied and fell to the ground, making the rain sizzle, evaporate, and scorch the surroundings.

"Oh, you have no idea," Bill grinned. "Now we can focus on what matters."

The barrier master strengthened her companions' powers, but Erik noticed her breathing growing heavier. Maintaining so many enhancements drained her mana rapidly, despite her ability to increase its regeneration.