I like the idea of combing the starter epics into a super epic with the use of a challenge. If you save up enough coins and play through 16 battles to get super epics (not counting the battles required to get the starters and resources to evolve them into epic form) I think the idea of having 1 (just one) legendary out of combining these four super epics would be great.
I understand it is controversial to ever introduce the chance of getting a legendary through gameplay (and not through the rolls) but this requires skill and sacrificing the four super epics you earn. My idea imagines the legendary is an amalgam of the features of the four epics (like a griffin character) and not different (like each of the super epics) - obtaining four differnt legends through gameplay may be seen as a bit much and diluting the value of the game (even though it will take much time and presumably you would require an omegamid + whatever resource is needed through a special legendary resource challenge).
If you are able to train more starters into super epics you would not get more than one legendary as the final legendary form, being an amalgam, would be the same (unlike where you have the choice to evolve into four different super epics) so if you choose to sacrifice your four super epics with the coins and other resources required you would just gain +1 as a dupe.
