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.
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.