Attunement
Magic Items
Most magic items, including charms and sentient weapons, require attunement to use. An adventurer must form a mental bond with the item in order to bring out its latent powers. The number of items they can bond is dependent on their Charisma.
Charisma Limiter
The maximum number of items an adventurer can attune to is equal to: (Charisma Modifier + 1), minimum 1.
Identification
The attunement process can be done over a short rest, provided that the item in question is identified. This can be achieved through the Identify spell or by paying 25 gp to a merchant during downtime.