http://forum.1cpublishing.eu/showthread.php?t=5516
see also
anyway here is detailed explanation of infinite money.
I prefer this method above the friendly gremlin thing.
Use what units u like but u need these 2 at least:
bone dragon: Not full stacked or let them kill ur full stack and let 1 or 2 alive
dryad/royal thorn or any thorns for spawning and respawning.
marauder
Enemy need a non retaliation army or ranged.
Play the battle the usual way and leave small stack alive and if it' s a non retaliation trap him so u have all the space in the middle. Use the dryads/thorn and spawn respawn to set it up. Cast magic spring several times and make calculations that they die in 3 attacks use the bone dragon' s poison cloud to attack ur own units. Rob the corpse from the ones u kill with bone dragon and the ones that die vs the sole surviver.
If u prefer poison cloud to get magic u can do it till turn 40 then rage stops flowing in.
I got 3 millions with this and the wasted it all at the dwarf to buy runes the rune prices raises like pancakes after every one brought.