Nexus

Ideally, the magus becomes a nexus between God and the World.
—Christopher I. Lehrich, The Language of Demons and Angels (2003)

Nexus is of Latin origin, meaning a “binding together” of two things.[1] The word connotes a link or connection “with a motive for mutual benefit,” as in a network.[2] The word can also refer to a central point or core.

Nexus was the favorite magic word of Nicolas of Cusa, the 15th century philosopher, mathematician, and cardinal.[3]

A nexus may refer to a dimensional gate or portal. For example, in the fantasy novel Beyond World’s End by Mercedes Lackey, a nexus is “the rent in the fabric of Reality that let[s] the power from the World Beyond seep over into this one.”[4]

[1] Steve Blamires, Magic of the Celtic Otherworld (2005)
[2] P.J. Alexander, Policing India in the New Millennium (2002)
[3] Anita Albus and Michael Robertson, The Art of Arts (2001)
[4] Mercedes Lackey, Beyond World’s End (2001)