World Brewable Potions!

So my idea is brewable potions. Potions that can be brewed using Zombie eyes, Naga Tails, Bat Ears, and stuff like that. There will be an NPC named 'Potion Brewer' where, upon clicking, you would put some random mob drops like the ones I mentioned above, into something like this : http://prntscr.com/bm3m8u This could be a better use for all those junk items you get from grinding.

Once the items have been given to the brewer, and you have clicked the check, you will be given a potions related to the items you have put in. You could Potion of slowness if you put in some zombie eyes. Maybe a potion of nausea if you put in some Troll hair. Potions of swiftness from maybe some Ocelot tails. Oh and you will be charged a certain amount of emeralds depending on how many items you put in.

I don't really know/want to explain all the combinations of items that can be put into the Brewer to get certain potions , so I'll leave that up to the people who, if they like my idea, add this into Wynn.