Void Heart (44/45) – Has no gameplay benefits except that it unlocks other endings and protects you from Void creatures.
Unless Team Cherry eventually buffs it, it’s gonna remain as the worst charm in the game. Not to mention it houses 2 CHARM NOTCHES. This charm can even make the game harder for you as it makes ranged enemies such as Aspid Hunters, Primal Aspids & Soul Twisters have an easier time kiting you from far. Heavy Blow (45/45) – The knockback on it is so poor that it has very little interactions with melee enemies.