I think you can already do what you want just by using the 'I happen to have the right kind of potion...' (roll lore) rule, as long as you have potion slots open.
So, for example: You need to life something heavy
In the game fiction layer, it looks like:
"Life force belt buckle activate! strength of a bear!" and you lift the thing.
In the rule layer:
(rolls lore) I happen to have a might replacement potion available. I use it and replace my might roll with the potions power.
So, the "I just happen to have a potion for that..." rule can also be used to represent someone who carries several enchanted objects. How many potion slots you have and how good you are at not screwing up lore rolls represents how much they change the story.
