1x43 - Jayce and the Wheeled Warriors

Saw Boss learns the Vine Stopper, a weapon created by Audric, could be reversed to speed up the vines' growth and sends troops to capture it. When the Lightning League hear of Saw Boss' plans they race to where Audric has hidden the device to secure it before the Monster Minds can but accidentally trigger a self destruct sequence that threatens to destroy the device and the whole planet.