I concur with Manfred - it depends on the logic of the 'language' used. If the spell is a logical process, then yes, an alteration would stand out, but if it properly arcane and barely understood even by its best practitioners, then Trojans and worms should be able to hide in suitably complex spells.
The PCs find a strange helmet, when donned it will take control of that PC and speak and act trough him/her. It explains that it is benevolent and needs their help in a quest and that it will stop possessing the PC when the task is done. Great if a player is gone for a number of sessions.
Encounter ( Any ) | February 15, 2011 |