Twin Identity

This spell transforms one person into the form of another. You must have the blood of the person you wish to imitate (which is consumed by the target of the spell) and that person must still be alive. This spell has no effect on a shapechanger or a non-humanoid and cannot be used to imitate a shapechanger or a non-humanoid.

Once the spell is completed, the target transforms to look identical to the blood's owner, becoming his/her twin. The target retains its own ability scores, hit points, and proficiencies. This new form is otherwise indistinguishable from the original and the twin can speak and understand any language the original does. The twin also has advantage on any Charisma check made to pass as the original. If the twin interacts with the original, or if either the twin or the original drops to 0 hit points, the spell ends and the twin reverts to its original form.

If this spell is cast as a ritual, the time required to cast the spell is 1 hour. The twin gains the memories of the original, limited to the names of people the imitated person knows and their relationship to him/her. The twin can also make History checks to recall information the original would know, the DC for any such check is determined by the DM.