Battle, Siege, and War spell durations for Ars Magica

There was an interesting idea shared on Atlas Games Ars Magica forums a long time ago for spell duration based upon battles and wars. Credit to Dunia for the idea. It reminded me of many of the durations used in both online games and other pen and paper RPGs. For a wizard who concentrated their skills in war such as many Tremere, Tytalus, or Flambeau this might be very appealing.

When I first read the post I thought that having Battle duration as equivalent to D:Sun was a bit on the expensive side as very few battles last this long; and in writing these versions of the new durations I have added conditions to their scope. Battle, Siege, and War are slightly different from how they were proposed in the forums.

As time has passed I’ve rethought and now think that there is a way to allow casual use of this style of duration which is a little more expensive, and also allow a dedicated war magus to use them with a bonus.


The difference comes down to the player buying a virtue, making a breakthrough for the effects, or just using them casually.

Hermetic Virtue – Warfare Magic (Minor +1) The magus has been trained in special disciplines especially devoted to warfare, and has access to three new durations: Battle, Siege, and War. Continue reading