Batman? wrote
i am having a little trouble following the actual execution of the wand of acid rain sumo trick. so you go down the stairs and break a wand of acid then challenge the sumo?
Find some means of invisibility or lure Huang outside far enough that he can't see you with food (steal some bananas from the banana drop if you have to).
Next, go down the stairs and zap your wand of acid rain north where Huang would normally appear in the sumo match. Wait a bit for the acid to pool on the floor, then go upstairs and challenge Huang.