Does the DM ‘have’ to make it worse than a normal fail? I know some swear by it, but I’ve never actually looked if it’s any written rule or suggestion.
No not at all - it’s just fun to. A nat one on attacks always misses though. Some DMs say if you nat one your attack you might hit a teammate or do something else disadvantageous, but it’s all contextual.
Does the DM ‘have’ to make it worse than a normal fail? I know some swear by it, but I’ve never actually looked if it’s any written rule or suggestion.
No not at all - it’s just fun to. A nat one on attacks always misses though. Some DMs say if you nat one your attack you might hit a teammate or do something else disadvantageous, but it’s all contextual.