Meanlucario
Time to get spooky
Advice for anyone planning on becoming a DM: Don’t punish your players through in-game means for out-of-game problems. This includes (and aren’t limited to) the player hoarding magical items, trying to steal the spotlight often, or trying to derail to story for no good reason. They will just see it as a challenge to defeat rather than you trying to nip a problem. Open communication and talking like mature adults is needed to help a problem player stop being a problem (or booted if they refuse to change and continue being a problem).