Forge log link: http://pastebin.com/CM0HKqRt

Problem:
When I try to place ANY item in the blood infuser it crashes, tried it on different worlds
with the latest version of evil craft, I'm using a modified version of Natural Magic, if that helps

Expected behaviour:
Place an item in the blood infuser and then a freeze, after a few seconds it says "Shutting down internal server" then it crashes

Steps to reproduce the problem:

• Use a blood infuser
• Place an item that you wanna infuse in the working slot

Also using 1.7.10 :D

Duplicate of #235, which was fixed in Forge a long, long time ago.
You should update your Forge version.
You are currently using 10.13.3.1387, while 10.13.4.1614 is out already.

I tried with all the new forge versions, and older ones, and recommended ones

You have invalid java libraries that are required by Forge, remove them, and try a clean install of Forge.

Hmm ok, how do I do that?