The Igni sign is one of five simple magical signs used by witchers and causes a burst of fire that can repel and ignite opponents, as well as start fires. Igni is incredibly effective against foes that are weak to fire. There is also an alternative form of Igni that allows witchers to release a steady flow of fire instead of one quick burst, which can be particularly useful for continuously burning enemies even after they've been ignited.
Added to Gwent
[Oct 25, 2016] In Closed Beta's initial build.
- See this subject on The Witcher wiki: Igni sign