The Tavern

The only resistance not covered by potions is mr, so I thought a new potion that would increase it by + or even ++ would be nice. A drawback could be either lowering physical resistances, like ac and/or ev, or a net % increase in damage received. Some lore to tidy it up about being more attuned to the magical realm at the expense of greater vulnerability or whatever. Then I thought that the brill potion could be hijacked and made more interesting if it had these additional effects.
It would make brill a desirable potion for pure melee guys, and no longer always an obvious buff on a mage.
What do you guys think?