Unseen Link

"Between the spells within our power, Give us one Harmonious Hour.

Use
Links two UnSeens providing that they use the same Charm.

Known Uses
Jenna and Septimus use this spell in Magyk to see each other whlist they sneak onto "The Vengeance" DomDaniel's boat.

Unfortunately Nicko wasnt able to be Seen when the snuck on the boat as he used a different Unseen.