I think i might have come up with a good concept for this. Set up a new npc some where, i suggest in the tent west of mod as its just sitting there doing nothing but selling balloons. When you talk to him he sends you on a quest to retrieve an item after you go some where and kill baddies. Then when you return with the item as a reward you get 1 free spin of the graal roulette wheel for a random prize. hat,mount,pet,morph,money. just like with the slimy spoils. 1 time a day daily quest.
and/or.....as a mini game for 750g's a spin or 1.4k g's for 2 spins no more than 2 spins a day. Every time some one pays to spin 250g's added to grand prize pot until some one hits the grand prize. Then the grand prize is reset to the base price of 25k. It would have dozens of sections, 1 hat.1 morph,1 pet,1 mount. 2-3 free spin spaces. 2-3 spaces with 0 (you lose), 1 bombs refilled, 1 arrows refilled, 1 double or nothing-you re-spin and if you hit a space with a gralat amount on it you receive double the winnings. from 500-1.5k gralat spaces. a 10k gralat space.