Up all night

I cant seem to sleep. Never played an arena game before and there is a steep learning curve. I think Im starting to get it. Just got my first solo victory. Never thought they would have a game of this caliber for the iPhone. Really the best time I have ever had on my phone.
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Just came back to the game after a couple years and all my purchased characters are gone. What happened?

Quidhala about Heroes of Order & Chaos, v3.5.0