Make ghost that haunt mobs and tries to kill you. If you kill mob while it is haunted ghost won't die, but it get's frozen for a few minutes. Haunted mobs are much stronger and if ghost stop haunting them they will just die.
I wish everytime I need money I always pull out of my pocket which I have in throusers that I wear exact amount of money and it always have to be in bank notes and coins with hightest numbers possible so I don't pull a lot of small coins and this pocket is always empty of money unless I need some.