Upgrading weapon that would be best left alone

The staff of bats, took from a necromancer upon palemoor island at the end of the iron skull saga has slot for two gems. The first is got from a well connected merchant we helped before The second evolves going past 4 ghosts cursed by very weapon we use against them that repeated tell me this is very very bad idea. We go forward anyway because we have to know what happens. Then there is an evil looking egg but what that will hatch will wait for a later episode Advertising Inquiries: https://redcircle.com/brandsPrivacy & Opt-Out: https://redcircle.com/privacy