Mystery Skin RNG
Hello Rito,
So I have received three mystery skins in my time of playing in the past six-ish years. Yesterday I used the re-roll into skin permanent in the "Loot and crafting inventory" and rolled into the Hyena Warwick skin, which marks my thirds mystery WW skin.
Personally I have no problems with WW but I would like to, semi-humorously, question your randomness of mystery skins. I don't know the math or the actual chances of only rolling WW skins but I'm sure someone at Riot does. I am a little frustrated with the outcome of my re-roll and would like a re-re-roll for any skin from any champion, I really don't care. I hope this is as vaguely entertaining to you as this has been to me. Thanks for reading this message.

Sincerely, Tyrson