When you cast an indirect combat spell with sorcery, the target gets to resist/dodge the spell with a Rea+Int roll.
The spell then is launched with an Opposed Test that pits the magician’s Spellcasting + Magic [Force] versus the target’s Reaction + Intuition .. (Core 283)
All spells can be learned as alchemical preparations. One of the options for such a preparation is a contact trigger:
Contact: The next living being to touch the preparation activates the spell.
Touch: Touch spells affect the living being touching the preparation. (Core 305-6)
So if I make a preparation of an indirect combat spell (eg. Punch), and the linchpin is then touched by an enemy, what do they roll, if anything, to avoid the effect?