Why do people glow sometimes?
Sometimes, I see people glow for a few seconds:
What is that, what does it mean and how can I do it?
Solution 1:
Recently, Spiral Knights changed the charge up animation for weapons. (It used to be most more obvious what was going on)
This glow appears when you have a fully charged attack, which you can do by holding the attack button down.
The exact nature of the charge attack depends on the weapon you are using.