How about new type of rapeprot - make a formula which increases the mob
level/hps/whatever by from the last date of killed, for example one person has
"rapeprot" and prot is 3 months, he comes back after one month, 66% of
rapeprot left, mob gets +10 levels. (Assuming you make 15 lvl/15000 hp/what
ever max boost, and 66% of that would be 10 level/10000hp etc) so the mob is
killable but a lot harder
Again, you figure the formula
