[s11e27] Corruption Info

The sudden, forced turn of a close ally (Nya) creates high emotional stakes for the team.

Here is a helpful summary and breakdown of the events in that episode: [S11E27] Corruption

Before leaving, the Garmatron is tested on Nya. This results in her being corrupted, turning evil, and gaining Garmadon's dark abilities. The sudden, forced turn of a close ally

The Stone Army and the Garmatron represent a massive, unstoppable threat compared to previous foes. unstoppable threat compared to previous foes.