I have collected the ingredients to make the elixir. When I go to my foundry, therer is only my normal items to make. The elixirs are not there.
Please check your filter settings.
They should appear anyway, but please check if you have activated all regions.
We see that the potions vanish when Egypt is disabled in the filter settings.
where the heck is the foundry?
In your camp.
Number 9 in here
Number 11 in here
It opens after the Isis mine „Old foundry“, so if you are early in the game you might not have it yet?
Both describe with pictures where to find the filter in the foundry, to activate the event recipes and to make the elixier there.