Each participant places their vial in front of them, and locks hands with the other participants. As the participants take turns speaking of the bond they share, their blood slowly flies from the vial, and begins to circle above the decanter. Each bloodstream spirals around the others until the last participant's blood reaches the decanter. Then, the blood fills the decanter. The objects swirl and dissolve and the blood begins to boil. This mixture then erupts from the decanter as thin, ephemeral threads visible only to the participants. These threads pierce the heart of each participant, causing no pain. More threads emerge from their hearts, joining each other participant in a bond stronger than any other. This bond provides the following benefits:
- As an action, a participant turns their thoughts inward to trace the threads to another target participant, acquiring their exact location as long as the target is on the same plane of existence as them. Otherwise, they learn of which plane the target is currently on. If the target is on the same plane, the participant may follow the thread through the most direct route to the target
- While a participant is focused on another target participant, they may attempt to see through the eyes of the target as an action. The target is aware of this attempt, and may choose to either accept or decline this attempt. The participant may continue to use their action each turn to continue to observe the target's point of view as long as they are left undisturbed, and the target allows the connection to continue. This occurs passively for the target, and costs no action, bonus action, minor action, or reaction.
- While a participant is within sight of another participant, they have advantage on death saving throws.
- While all participants are within sight of each other, they gain advantage on saving throws against being Frightened or Charmed by creatures that do not share their bond.
- On the death of a participant, their last minute, as seen through their eyes, is transferred through the threads to each other participant. Each participant must succeed on a DC 12 Insight saving throw or be paralyzed while the vision plays out within their mind. If the deceased participant was killed by a creature, that creature makes a Wisdom saving throw with a DC equal to the original caster's spell save DC. On a fail, the threads attach to the creature for one week, allowing the participants to seek retribution for their fallen comrade. A participant must make a DC 14 Insight check in order to follow the threads attached to the creature, and learn of it's location. With a subsequent DC 17 Insight check, the participant may see through the eyes of the creature. The creature is aware of this intrusion, but can do nothing about it. The DC 17 Insight check must be repeated for each turn the participant wishes to continue observing the creature's point of view.
This effect can only be ended with a Dispel Magic spell cast at 9th level.
Some participants, particularly Clerics, Warlocks, and even some Paladins may come into conflict with their Deity or Patron by participating in this spell. Whether there is any consequences, and their severity, is left to the discretion of the DM.
* - (At least two participants. A crystal vial worth 500 gp for each participant, filled with their blood. A crystal decanter worth at least 2,500 gp large enough to hold the contents of each vial, and objects precious to the particpants (a wedding ring, lyrics or musical notations to a song, handprint of loved one). The blood and precious objects are consumed by the spell.)