It is a sign that Geralt uses on himself – quen absorbs all damage directed at Geralt, and the upgraded version reflects 50% of the damage back toward to enemy. – a protective shield that lasts for 30 seconds at the sign's basic level. These will work in unison, creating an impassible barrier. After upgrading it, you'll be able to place up to three yrden signs at a time.
The sign's basic level allows you to place a single yrden sign on the ground. – a magical trap placed on the ground, which will wound and immobilize opponents. It can also be used to detonate flammable gases emitted by some bombs. When upgraded, the sign has a chance of incinerating opponents and has a larger area of effect.
This sign can also be used to destroy obstacles, for example crumbling walls or stacks of barrels.
– a telekinetic wave that can throw back, knock down or stun an opponent.
Unlike the original game, Geralt is not required to re-acquire his knowledge of signs in The Witcher 2.
