The way Geralt uses Signs in The Witcher series has changed significantly from one game to the next, as have the skill trees assigned to each Sign. To help guide you towards a combat style that works for you, I have compiled footage of each Sign at each upgrade tier, so you have an idea of how Geralt's magical abilities behave from one level to the next. Don't forget: to use these Signs beyond their default effects, you not only need to spend skill points on them, but you must also slot them into the ability grid on the right of your Character screen. Slotting a mutagen of the same color in the same quadrant will then make that mutagen, and the Signs slotted into that quadrant, more effective. Happy hunting!