Name can be changed.
Allows enemies to aggro on each other for a couple of turns or after accidental hit. Maybe randomly gives amok for 3 turns to enemies in fov from time to time.
As a drawback it lowers damage of you and allies.
#Trinket idea: seed of discord
indigo herald
atomic musk
War horn
from time to time (or a cooldown) the horn will blow itself (the sound can be the same as reading the scroll of rage) that will inflict Amok for 2 > 3 > 5 turns to all enemies in your view but the sound from the horn makes your ear bleed and cripple you for a few turns
There are a lot of ways this can be changed like the punishment can also be Weakened or Vulnerable
Or the effect can be changed to permanently make a random enemy in your pov to an ally (particularly strong enemies can resist the effect)
midnight lantern
I think the whole point of trinkets is to affect the game in a less combat-direct manner, and I feel like this would make that idea obsolete