@sleepybisexual yeah anyone who attempts to fuck with time gets eaten by the time worm.
Time travel?
Eaten by time worm.
Cast accelerate time
on your microwave so your snack is ready sooner?
Eaten by time worm. the snack that is, not the caster. We don't know if the time worm is particular about only eating time accelerated objects or if it just likes snacks. We do know it usually eats the microwave as well.
Attempt ftl travel?
Eaten by time worm. wormholes usually deliver spaceships straight into its maw.
One can take advantage of the time worm in combat by creating a magical circle of reverse time
and anyone who steps inside will get eaten by the time worm. This technique has been outlawed by the wizard council. Also the time worm sometimes eats the caster as well.
There is only one time worm, but on account of it being a hypocrite it can exists in arbitrarily many places at once.