Notes for Running Wild Surges
Wild Surges not only represent a breakdown of the rules of magic, but they are also a potential breakdown of the rules of the game, as the results of a wild surge can often require off the cuff rulings by the DM in order to adjudicate those results. While the way to apply the wild surge will often be obvious, at other times it will require finessing combinations of spells or effects that appear contradictory but nevertheless need to play out in-game. However, here are some basic guidelines to follow when applying these results.
- Targets and Spell Placement. Before rolling to see if there is a Wild Surge, you should make all choices for the intended spell as if it went off as normal. Then, roll to see if there is a surge, and what the surge’s effect will be. If at this time the spell’s range, area, or number of targets changes, adjudicate those changes.
- Usually, the Intended Spell Still Goes Off. Unless the rolled result says otherwise, the wild surge result is in addition to or modifies the spell that is being cast. Occasionally, some results supersede the spell itself, but the result description will make that clear.
- Range. If not otherwise stated in the wild surge result description, any reference to range refers to the intended spell’s range.
- Saving Throws. If the intended spell allows for a saving throw, the wild surge effect also allows for a saving throw to avoid or lessen the effect, unless the result says otherwise. This is also true if the intended spell allows for a repeated saving throw to end the effect or condition. The type of saving throw, however, may change if the surge effect is emulating a specific spell or simply states otherwise. Furthermore, unless the caster is specifically denied a save by the surge or spell description, they can choose to save against their own effect.
- Target. Unless the wild surge result description says otherwise, the surge effect occurs or is centered wherever the original spell goes off (or was expected to go off).
- Duration. Unless the description reads otherwise, the wild surge effect lasts as long as the intended spell’s duration. Furthermore, when a wild surge effect manifests in the form of a spell that normally requires concentration, the spell does not require concentration and automatically lasts its full duration.
As mentioned above, sometimes the wild surge directions do not seem compatible with the original spell. In this case, lean into the randomness and wildness and be creative in how the spell or surge manifests. For example, it may be hard to know how to adjudicate the “Spell effect has a 20 feet radius centered on caster instead” when the sorcerer was attempting to cast mage armor. The DM might rule that all creatures within 20 feet of the caster gain the mage armor spell, that anyone within 20 feet of the caster gets the benefit of mage armor while there, or that the armor’s benefit only works for attacks from greater than 20 feet away because anyone else is within the armor’s effect, or some combination. Rather than attempt to codify how such a wild magic results works, consider choosing a different kind of ruling each time the situation comes up to make it truly unpredictable.