Skin Rerolls are Bull Sometimes

So after patiently collecting 3 epic skins from chests, (Odyssey Ziggs, Shadowfire Kindred, and SSG Taliyah) I finally could reroll. I thought I would just get another Epic skin from this, maybe even a legacy epic. I end up getting "Statue of Karthus". This skin isn't even "Epic" class nor legacy. What are the odds and why did I get a regular skin instead of a Epic or even maybe Legendary?
Best New

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

Report as:
Offensive Spam Harassment Incorrect Board