...Flashing sets off my migraines too,..
I've seen one really bad effect in the gameplay presentation (
https://www.youtube.com/watch?v=B9hU6UJX_pc starting around 59:15 ). I'm not sensitive to flickering effects in general, but this really made me look away. I hope this is the only effect that's extremely flickering.
I guess this can easly cause a seizure :-/
I asked myself why these firebolts even have to flicker....