It seems that forge changed something in regards to loot tables, as this crash suggests: http://pastebin.com/mzaC2Xcv
This was discovered when updating forge, mantle, and Tinkers' Construct, though the latter two were then downgraded but the crash still remains.

I think it comes from forge adding loot accessors again (from what I gather from other mods' changelogs) and somehow breaking evilcraft's loot access

Yes, @zlyfire is right. I tried to be smart and coding everything in such a way so that when Forge implemented loot accessors, EC would work with it right away. Unfortunately they did more changes to that system than expected, so I'll have to change some things after all.

I get exactly the same bug, I don't know from where it comes.

@EnderT5 Update is available now.

THANKS !

Excellent!

same happens to me (forge-1.9-12.16.1.1900)

http://pastebin.com/598hHnf7

still not fixed, even updating cyclopscore and forge

@EnderT5 But ... I'm still in the process of releasing a new EvilCraft version, that's the one that will fix it. Just a little bit more patience :-)