Cut off Gale's hand in satellites in Game. He has excellent command of Weave magic, but due to a mistake in the past, his magical power has decreased.
During the first act, the hero finds himself on the verge of life and death - in order not to be broken when the illithid ship crashes, he opens a magical portal right in the air. As a result, his hand appears from the Circle of Ancient Signs near the Cliffs along the road. From the guide you will learn how to cut off Gale's hand and what will happen afterwards.
How to cut off Gale's hand in Baldur's Gate 3
You can deprive Gale of his hand at the very beginning of the story, provided that you play as Dark Seduction.
During the first act, near the illithid shipwreck site (X:220, Y:325) Notice the Circle of Ancient Signs.
It is unlike the others and emits a dark glow. Come closer and start interacting - the wizard’s hand will appear from the portal, and he himself, in a plaintive voice, will ask for help. Select the option “Imagine how good it would be to cut off this hand” - it is unique and only available to Dark Seduction. 
After a short cut-scene, the item “Gale’s Severed Hand” will appear in the character’s inventory. 
What happens if you cut off Gale's hand?
Gale will disappear and will not appear again when beating the game. Most likely, he will fall from a great height and die. The portal itself will close and remain filled with blood. In fact, this is the only way to get rid of Gale in BG3. Otherwise, he will have to be resurrected after each death.
Of course, this choice is quite cruel and the companions in the squad will be surprised when the player cuts off Gale’s hand, but the wizard will not bother them anymore, because he can cause the apocalypse.
In a separate article, they how to resurrect Gale in Baldur's Gate 3 and what will happen if he is not revived.
Will Gale's severed hand be useful?
It's best to keep Gale's severed hand. As you progress through the game, you may need it for some quests.
We hope the guide helped you figure out how to deprive a wizard of a limb and what Gale’s severed hand is for in Baldurs Gate 3. If you have any questions, ask them at comments. Follow more articles on the game at the relevant section our website.
Did you actually play the game? By choosing the option “Whatever is in you, I want it away from me” when Gail talks about her “illness”, you can get rid of your companion in a simple civil way by kicking him out.
This article examines one specific situation. Players look for this material at the beginning of the game