Non Sacrificeable creatures
I have added a way to mark some creatures so that you will be unable to sacrifice them. This will be used in the upcoming combat tournament. These changes had been being worked on for a few months now but it is needed so I have finished some of the changes and deployed them.

Certain creature classes will not be able to be sacrificed in the future. I will announce when this happens.

An additional part of this feature, which has not been pushed, is to allow you to mark certain creatures as "do not sacrifice" and they will not show up on the alters for you. I can prioritize this going out if people think its a good feature. Contact me to let me know.