How do you get access to rust monsters exactly? You cannot summon them, you cannot teleport to their lair, and at heroic and early paragon you cannot easily and safely contain them. They are one use only as well. And by middle to late paragon the items they disenchant are a minor ammount of gold.
Oh sorry, I assumed that the D&D world has an actual ecology and stuff like that and not that monsters spawn randomly in level appropriate encounters 100 feet away from the PCs.
You seek them out, you capture them, you breed them (pay someone to breed them for you).
Oh really.
You're saying, if I understand your reference to Walls of Iron correctly, that an intelligent player with a pen of rust monsters could get a gamebreaking (or possibly infinite) amount of money.
How? Seriously. How do you pull off this magic trick?![]()
That would also require the ritualist ring which allows you to craft items at half the price. The amount of residium you get from the rust monster would still be the market value of the item, meaning that for every rustmonster the enchanter doubles his investment.