Can the Epoch Crystals Be Permanent?

These crystals are nice. I enjoy being able to target champs to a greater extent then dual classes. Maybe we could keep them for 250 units each? I would love to keep opening them over and over until I get who I want and then go to a different year.
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Plus why would this cost less than as Cav crystal at 300 units? You should be paying a (hefty) premium to pull from a much smaller pool, similar to the 5* and 6* Featured - your suggested crystal would probably be 400-500 units in cost...
This was alotta fun compared to the regular featured cavs where is a pool of so much more champs amd also for 300 units a pop.........this limited pool is so much of a better target if i went snooping around for these crystals.
I need my fix cuz im all out haha, wish i could have grinded a month for these crystal shards. For at least 10 more
I had been searching for Warlock for a long time! And this my first ever 6* from a Cav crystal too!
I would like the dual class crystals to go around the wheel with a 6-day rotation. Mystic/cosmic, cosmic/tech, tech/mutant, mutant/skill, skill/science, science/mystic. It’s a small tweak, but it probably makes it easier to choose at times (or to avoid overloading on 1-2 classes).