You know what might have been cool for the current campaign? Given the upcoming campaign mythic’s spell and him seeming the inverse of Shahbanu Vespera?
How about a “Medal of Dao” that’s the reverse of the Medal of Anu? A medal that drains the other team’s mana by 20% at the start of the fight, coded to apply only after all other effects have been accounted for (traits, medals, et cetera?
Something that would simply blunt the effect of Empowered without making it a completely useless trait, assuming the player is willing to make the necessary trade-off, namely a reduced ability to amp his own team’s stats through other medals on account of having fewer medal slots to apply stat boosts to one’s own team.