You petition Thendros to allow a recently-departed soul to briefly appear and speak with the living, before resuming its journey towards the afterlife. The spirit appears soon after the ritual is performed. They cannot harm anyone and cannot be harmed. They can speak normally and retain all of their memories except for about a minute prior to their death. They cannot leave the Holy Ground or ritual site in which the ritual was performed. They can remain present for no longer than 5 minutes; after that time has elapsed, they are pulled back through the Veil and disappear.
If you perform this ritual outside of Veilguard, the spirit can only remain for 1 minute before it must return to the Veil.
Please notify Wheelhouse as soon as you know that you intend to perform this ritual, so that they have time to organize the PC or NPC shade and ensure that whoever is playing them understands what the rules of the ritual are. Wheelhouse will coordinate with you and whoever is playing the targeted spirit to ensure that they are present and able to appear at the end of your performance of the ritual.