The ritual marshall should state "Resist" when this ritual is used and the tag should immediately be given to the ritual marshall. A target may have more than one Strengthen ritual cast upon it, but it counts towards the twenty ritual maximum.
This is the exact wording from the Seattle Database link. I just was trying to double check. A player decides if a Destroy Magic is resisted or not, right? Like, lets say you put resist destroy magic on a spirit, then (for plot reasons) you want a destroy magic to work and target something on the spirit. It will bypass it if the player chooses it to, like the way other resists work?