people are doing the worm hunt now, maybe because it is the weekend
check the calendar
if people are doing it just hit the worm and don't die
seem to get like 1 credit every .5s you are in combat with the guy
when he runs you can get in the cars (and sometimes before then, idk)
the car does like 500k dps as long as you keep picking up the ambrosia orbs (green) and firing
also if you aren't in a car good luck keeping up with him
cars can even hit him while moving
easy 16000g that you can get at like level 4