How To: Edge that provides a bonus to a skill, selected at the time the Edge is taken

[tatteredking]

Setting: RunePunk
Edge: Runic Tattoo

Player selects a trait at the time this Edge is taken. All rolls with that specified trait get a +1 bonus.

May be taken multiple times, but each time a new trait must be selected.

I've coded the 5 Attributes as 5 separate Edges, but would rather not do that. So I am attempting to figure out how to do it using a usrCandid1 Field, but am not sure how to go about it.

Will be looking around for other Edges that do similar things, but figured I would toss it out here.