The Old One Charm is a Pre-Hardmode accessory. It increases minion damage by 12% and grants +1 max sentry. During the Old One's Army event, this accessory grants 22% increase to minion damage instead. It also can be used to skip the time between waves in the Old One's Army by pressing the accessory ability key. It is bought from Goblin Slayer at the cost of 5 Defender Medals. It can be upgraded to Cursed Eye of the Soul Binder.
- This accessory is really powerful against Old One's Army after defeating the event once.