Igni sign



The Igni Sign is a simple magical sign used by witchers. It is comprised of a pyrokinetic burst that can repel and ignite opponents, as well as start fires.

The base ability produces a directed fiery blast that damages enemies. This blast scales with weapons and armor enhancements which govern Sign intensity. There are four other Igni-related abilities which can be enhanced by allocating Ability points via the Character panel:


 * Melt Armor (5 levels)
 * Firestream (3 levels)
 * Igni Intensity (5 levels)
 * Pyromaniac (5 levels)

There are six places of power scattered throughout the game regions that enhance the sign.



Igni - in its basic form - releases a gush of flames that wounds opponents with fire. It can also be used to detonate flammable gases emitted by the Dragon's Dream bomb and dead rotfiends.

To activate the sign, press and select Igni; then press  key to cast it.



Upgrading the Igni Sign with "Enhanced Igni Sign" (in the Magic tree) will increase its damage output, its effective range, grants a chance to set enemies on fire with Incineration, and grants it area of effect damage.



Igni is most likely the second Sign Geralt "learns" (or re-learns!) over the course of the game. It can first be acquired from the Circle of Inner Fire in the Crypt in the outskirts (see the list of Circles of Elements below for other locations. Its icon is based on the alchemical symbol for Fire. The witcher's skill with the sign is developed through the allocation of talents.

Mechanics

 * To use the Igni sign, right-click on the desired target.
 * Endurance is used whenever the sign is cast, if the overall level is too low, Geralt will not be able to cast the sign.

Later on, visiting the Circles of Elements attributed to Igni grants Geralt the Blessing of Fire.

Circles of Elements
Circles of Elements dedicated to the Igni sign include:
 * Circle of Inner Fire in the Outskirts.
 * Circle of Inner Fire in the Lionhead Spider cultists' lair in the Sewers.
 * Circle of the Vengeful Flame in the elven ruins in the Sewers.
 * Circle of the Walking Fire in the Fields.
 * Circle of Inner Fire in the Raven's crypt.

Strategy

 * Info from Damar's Definitive Guide to Witcher Signs (the original post has now been removed from the forum):
 * Ah, Igni. This is arguably your greatest tool of mass destruction, and when upgraded, it gets so powerful that using it almost feels like cheating. There is a grand total of one enemy type in the whole game that is immune to Igni. Everyone else burns just fine.
 * Unlike Aard, Igni starts out rather mediocre. It consumes a good amount of Endurance, but without upgrades, the damage it inflicts is downright pathetic. Once you buy into it, however, it quickly becomes Geralt's most devastating attack. It pushes enemies back; it sets them on fire for a nice Damage over Time effect; and it even has a built-in crowd control mechanism that sometimes makes humanoids stop, scream and try to beat out the flames. This is different from the Pain effect, but it does stop your enemies from trying to bash your skull in, if only briefly.

There are only two circles of elements in "The Price of Neutrality" and only one of them is for Igni. It has no special name.
 * Circle of Elements southeast of the Camp, across the river.