I propose the following improvements for fusing items:

1. Add a variable (user specified) power fusion crystal to be purchased from the store. The price will depend on the requested/required fusion power.

2. Allow items to be fused directly from the shop - this will combine the "purchase" and "select item from inventory" steps into a single step. Ideally this will not be needed if item #1 is implemented.

i vote yes

I like the 2nd idea no to the first