Also, for those who didn't get the memo, you should spend your gold as soon as you get it, whether on items, tower upgrades or simply potions. The more gold you have on you at any given time, the more likely you'll be targeted by other mages as a source of quick cash, and it's also more money that the coven loses when bastards like Kamikaze Krew jump us. I found this out the hard way before joining the coven. Even if you don't have much money, you can usually afford potions. Treat the potions sort of like a bank account. You can keep the potions to sell at a later time so you can afford some other item. Even though the price is cut in half for selling, it's still better than losing it all when gold-hungry mages surround you like a pack of sharks drawn by the scent of blood.