mimic cards

[Snowhawk]

Stack as in what? Take both to increase chance or do you get two possible chances?

I think either case the answer is yes.

I think its the latter of the two as I've done this with Birthday gear. Birthday Hat + Back Pack gave me twice as many Gift Boxes, but I kept getting different types so I believe I was rolled for each item that grants the effect.

So if you have two Mimic Carded accessories, its rolled for each one you have. Essentially you have two chances to get an Old Blue Box, but both are still at the set percentage.