After a week of trying to figure out the cause of a crash with a hydra spell. Turns out it was caused by a mdl edit I made. It is the archmage's missile without the smoke, and replaced huge geosets with invisible squares. Need someone to locate any suspicious thing that could cause a crash.
The crash happens only when there are many instances of the model
I'll add it as new post, to bump the topic xD how many instances are you talking about? I gave Gryphon Riders your fireball model and placed 60-70 of them, and I moved them, attacked with them, killed some, and nothing crashed.