http://pastebin.com/H5h146iC

I'm not sure what causes this error or how to troubleshoot it, so here's what I have and hopefully it makes sense to you.

Update tainted magic. It was fixed in the newest version.

I see now, the report is an old one, apologies.

http://pastebin.com/cVpyNTqy This is the correct crash log, from version 1.1.6.4.

It is a problem with the class that updates the attack damage for the Mage's Mace focus. not sure what though.

The ticking player does have one; are there any tests you'd like me to have them try?

I have (potentially) fixed this issue, the fix will be in the next patch.

Next patch... ?