Bomb Offered:
so any way you have 12 herbs and to make it easy i suggest using color herbs such as:
red, blue, yellow, brown, pink, purple, orange, white, black, etc. (i was thinking having around 12-15 and i hope you get the idea)
then you make a building that costs 80 food and it sells 2 of these herbs at start (sells all the others at a price). then you get upgrades in a different building that allows you to buy 2 different types of herbs each time.
Next I think it would be a good idea to use a mixing pot (this is the only place herbs may be mixed).
This mixing pot contains most of the recipes for most of the potions within books like the mags but labeled offensive potions and defensive potions. (you could not give away some of the potions ingredients aka having secret potions).
finally give the pot a ability called mix herbs this ability combines herbs in the pot making a potion, if they do not make any of the potions it creates "nasty green stuff"
nasty green stuff: heals 5 hp
this will allow you to only have one building that sells these herbs to reduce mass potion production (herbs would need a cool down and possibly hold 2 at max). this also solves the solution of having to run across the map to find herbs. Finally it will still allow you to get these herbs no matter how many times your buildings are destroyed because all your buildings that sell those herbs can permanently sell them even if rebuilt.
That makes sense, Heres the run down of the concept from what i have interpeted:
to prevent mass building of a special building it costs 80 Food thus allowing just one, at the beginning your only able to buy 2 kinds of herbs for free the rest require a wood or gold kinda like the market, then your able to get a diffrent building that allows you to buy 2 diffrent kinds of herbs randomly per purchase like a building that you pay gold or wood to that spits out random ingredients in pairs of 2, instead of forcing the Builder itself to magically mix these ingredients or herbs you have a mixing pot building which would hold the recipes and a inventory so you may make your stuff into potions so as not to be forced into putting stuff on the ground and mixing them on your builder also the building would have a activated abillity called Mix Herbs which would take the ingredients inside the buildings inventory and create a pot if the ingredients are correct you get the pot but if you made a mistake then it creates junk which is the Nasty Green Stuff which would offer minimal health recovery aka 5 health healed, and lastly hes saying the Stock of the Market places herb selection would be 2 with a cd for the refill much like the items in the Merchant.
at least this is what i beleive your saying bomb?
Darox offered:
An ability that summons a random potion ingredient, much like Enchantment, would be preferable to the map wide item spawning.
I beleive both of these ideas would help out
sorry if i misinterpeted
but i hope this clears things up.