Trading champions!!
What about an event or something in which we are able to trade champions even for once like we trade class catalysts.
I would be happy to trade my three 5 star champions to get one of my favourite 5 star champion. Same for 6, 4 and 3 star champions.
Here is the second idea (Class Based) -
3 Tech Champions => 1 Tech Champion
3 Skill Champions => 1 Skill Champion
............
I am sure it will totally work out and everyone will appreciate it.
Thanks