Item idea.

I was thinking about an item that give you +X% on your special ability. For example an Herb Witch would gain +X% on boosting nearby tower's speed and gaining xp. Elvis Imitator would gain +X% of 2 seconds. Hope you find it fun. :)

would it be a generic item that adapts to whatever tower is wearing it? Or is it a special item for every tower around?

A generic item.