Game is pretty balance at the moment, only thing standing out is the crit ring of ranger, almost every build plays luck and the ring to get 100% crit chance, doesnt matter what weapons or other items you use, seems broken.
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Unsure, yet to actually play as the Reaper, but just looking at the mushroom, it's the base item that comes in their pack, and nothing in the description seems to imply anything regarding massive recovery capability. Though, if that's the case, that's a broken item to have popping right at round 1. xD