First and foremost, I am in no way advocating for the return of Krelos. (If anything, my position is that he should be fully eliminated from the game, including from the rosters of those who currently own him.)
I’m sure we can come to a consensus that Krelos was the most apocalyptic, game-changing dragon made and released to date due to how speedy he is. However, owing to that speed, I believe there is also room for the consensus that he’s a very handy, beneficial dragon to those who have him in their rosters.
My proposal is simple:
We all know how mundane invader bases can be when we’re faced with so many things to farm from them. Currently, invader bases cap out at tower level 95, which becomes available at player level 460 (player level 465 in Atlas); by this time, a player who is caught up should have bred most of Abyssal tier, and preparing to roll into Eldritch at level 471. Therefore, I believe it would be best to restrict Krelos at the Abyssal stone, for the sole purpose of alleviating the drudgery that invader bases present us with. Current owners of Krelos could keep theirs at Eldritch status, although I really think it would be better for the game in general if theirs were pulled down to Abyssal tier as well.
This is where things divert from the status quo; my proposal comes with a catch, the catch being that Krelos can be reset to Orange tier. However, the reset would come at a cost of 2000 rubies, and all XP to level again would be provided upon resetting based on where Krelos was prior to resetting, with the only penalty being the food that is required to level him back up; this is a reasonable cost, given the sacrifice. I also believe that it would probably be best if from here on, Krelos could only be used for invader bases and mini-events (i.e., Assault and Dungeons), or against anything that isn’t a player-owned base.
The only other alternative, which I still see fit, is to remove him from the game entirely, but at least with this system, he’s made useful in a way that isn’t prone to exploits or abuse, as with the status quo.