I wish I could get a log but it crashes so hard that it just says ". NET stopped working", the logs dont report it.

It happens on the second phase of the Ice Guardian, when he turns into the worm, seems to be random what causes the crashes but I know using the rainbow rod on him can cause the game to freeze and then crash, It might have something to do with piercing attacks?

EDIT: checking some more, it might have to do with attacks that hit multiple segments at once, like the Rainbow Rod does when it explodes or the Meteor staff, using both these weapons on the boss causes the game to crash.