Reading through some of the linked sites from Project Redcap reminded me of a spell from a few Ars editions ago – the Exchange Between Prison Bars (was it in the 3e Grimoire?). This spell switched the images of two people. From 3rd edition days the targets were a lot more fluid and debatable. In 5th edition the spells tend to have a single target or “pay” for a group target, although it is certainly possible to have non-standard targets too.
Here is a variant for 5th edition Ars Magica.
Exchange Between Bars
Muto Imaginem 25, R: Voice, D: Sun, T: Special
All four sensations of the person targeted and the caster are switched.
(Base 4, +2 Voice, +2 Sun, +1 additional special target)
Nice, but a Rego spell is really doing the switch properly, although it’s probably superfluous to actually switch positions. Maybe handy in some combat circumstances or to capture an enemy.
Teleport Between Bars
Rego Corpus 20, R: Voice, D: Momentary, T: Special
The target and the caster exchange placed via teleportation as long as they are within 50 paces of each other. Requisites may be required
(Base 5, +2 Voice, +1 additional special target)
Find over 513 other new spells for Ars Magica can be found on the spells page.