You can negate any Chi-based ability with a duration that you encounter. Make a Creature Powers roll against the Action Value that generated the effect you wish to negate, this can be Creature Powers, Sorcery, Arcanowave devices, Martial Arts or perhaps some other skill. If you make it, that power is negated. If you try this on magic affecting someone, you must also beat his Dodge, and people nearby can try to defend an object. You cannot remove permanent magics, but can tell how it is done. See the Remove Curse under the Sorcery schtick Divination for more on negating permanent magic.