The bOx

The bOx is a rare trinket with a single use that spawns The Lost when activated. With only 1 charge, this is a one-time trump card rather than a repeatable tool — save it for a fight that demands the extra unit. The Lost is presumably a specific and notable entity, so deploy it strategically in encounters where an unexpected ally can swing the outcome.

The Lost as a summoned entity likely refers to a specific named summon with its own stats, abilities, or behavior rather than a generic fighter. Single-use summon trinkets at rare rarity tend to produce something strong enough to justify the limited use count. The spawn fires once when the trinket is activated, placing The Lost into the fight as an additional ally until it is defeated or the battle ends. Since the trinket has exactly one charge, you carry it as insurance for a difficult fight and the trinket slot becomes empty after use.

Save The bOx for a boss fight or an encounter where your party is outnumbered and a reinforcement unit could absorb hits or deal significant damage. Using it on a standard fight wastes the one charge on an encounter you could have won without it. If The Lost has unique properties such as dealing heavy damage, absorbing attacks, or applying debuffs, choose a fight that maximizes those traits. After the charge depletes, the trinket slot frees up, so replacing it promptly ensures you are not running with a dead slot for the rest of the run.