Like title says it will be nice if they add such a function all ppl will benefit from it cashers and non cashers.From the day treasure hunt was released I have saved 109 cards but cant make a lvl 3 card not to even think about lvl 5 witch makes card upgrading event useless dont think any one will make a lvl 3 card since for white lvl 2 needs 10 of the same kind and i think lvl 3 was 30 xD.With such a function you can use all the saved cards you have gather to transform them in to the once you need .Comment what you think.