I feel like it's a cool idea, but the only things that would be worth anything in the end are skill shards, 3* Evo runes, and the white 3* shards. I mean I'll give you straight up 100 3* purple shards for 9 white shards, or 9 Evo runes lmao.
Drew-1616
16 5 star characters level 100, 51 max talismans. Mostly Red builds.
I rotate between the red bat, hellhound, samurai, soldier, purple harpy, and Carriage Rider. Looking for active troopers with Eddie champion, or max talisman ally.
I was talking about this in a topic about colored evo runes hard to find, but in spite this would be nice, i think they'll never implement this: the game would become too easy and nobody would any longer buy anything