There are many folk on Worm whose jobs revolve around getting creatures through black holes safely. These creatures do not fall into that category. Grimbols are quite mischievous and like to mess up time travel experiences. One thing they do is sell fake time travel equipment such as light repellant shorts that don’t repel light, worming tablets that are just cheap mints and mop buckets that can’t carry anti-matter puddles. If you purchase anything from a grimbol and try to travel through a wormhole you may be missing vital body parts when you get to the otherside.