Bungie officially answered how the "debuff" works. Here's a summary to help you: - After the first character of a class finishes the weekly engram drops for a certain week, all other characters on your account of the SAME class will have their luminous drops downgraded to regular legendary drops for that week. With this information, the conclusion is: You can delete any Warlock you want, [b]provided both or none of them have completed any weekly luminous engram drops[/b]. If either one has even one weekly activity for a drop, then THAT Warlock will be the only Warlock THIS week that can get normal luminous engram drops. If this still doesn't make sense, just tell me what progress you've made on your warlocks and I can help you answer your question accurately!