Summon

Summon is a ritual in the Path of Spirit
In 3e it appeared on pg 104 (not to be confused with the similar spell Summon Spirit on page 107) as well as in Voodoo/Hellboy
The 4e version appears on page 162 of GURPS Thaumatology.
There is some overlap between this and the inherent ability of spirits meta-trait from 3e ability to warp to places where they are called to.
It's not clear if this ritual is meant to represent that manifestation of the ability, or if this ritual is meant to work even for spirits lacking that ability.
With that metatrait gone in 4e it now seems a 0% feature, as indicated in the 3e Spirits writeup for Banish (spell)
==See also==
*Spirit Trap
*Summonable
category:rituals