Without a time limit some clans would just use pots, wait for the monster to regen and then do it again. In the end they would kill it and get tons of money.
I personnaly do not like the time limit either but i understand it. You could mabey make it longer but not get rid of it.
I personnaly do not like the time limit either but i understand it. You could mabey make it longer but not get rid of it.