As KillauraEntity has become impossible to maintain or even correctly implement on newer minecraft versions and had lots of bugs on older version I have decided to remove the check.

* A NPE
* An IllegalStateException
- KillauraEntity
- EntityCheckCommand

Issue milestone: https://github.com/Photon-GitHub/AACAdditionPro/milestone/38?closed=1

You need to delete your config before updating or take a look at the revisions on gist.
Please report issues on the issue tracker!