"Twilight, you have shown me the error of my ways. I know now my forces and men, as large and powerful as they are, stand no chance against the power of friendship. Thank you for telling me exactly how to defeat you."
A typical Greedwyrm grows more powerful and less intellectual the more treasure it accumulates. Glare, unable to overcome his greed, instead strove how to transform without treasure and keep a measure of coolheadedness.
While immensely powerful in this form, Glare's calculating intelligence is dulled and is still somewhat vulnerable to attack. Any larger than this, and Glare begins losing control.