This may seem odd from a free member but, how about a set amount for lifetime memberships?

This is economically feasible when you realize that alot of players who buy a premium will buy for a year or two most before the polish wears off. Some of us will keep playing long after but many bore with a ...

Ye can always do the blood system with organs. With that you can have a pathogen thats introduced. If ye hold the pathogen, certain organs or veins are decaying armies while others where the pathogen grows would gain.

Also with the teeth ye could always group by molars, incisors, bicuspids, and so ...