Alchemist (Legendary Nature or Metrocard)

A support tower that melts common & uncommon items, has a chance to turn them into potions (the potion image would be a simple elixir with the item image to the body of bottle). Process time is 5 seconds, and cant be sped up w/ atk spd. The use count won't decrease if the process fails. To prevent every tower to become Mr. Iron, this tower has limited use of (?) after building it. Only increases by (?) For every level up and the chance only increases through luck. I'm thinking about every tower only having limited alche-pots to consume but it might be too much for a legendary tower.