Is "Re-roll into random Champion Permanent" guaranteed to be something I don't already have?
... or is it true random?
I own every champion. I have no need to Blue Essence. The only need I have of Champion Shards is if re-rolling them is guaranteed to get me a champion I do not own - in which case, I can just save up three shards for the new champion.
Otherwise - why am I getting Champion Shards? I had gotten lucky up to now and only gotten cosmetic shards - and I assumed it was intentional.
P.S. Champion Mastery is a player behavior system, isn't it? Promoting playing with friends, etc.
-teed to be something you do not currently own