In the game Baldur's Gate 3, the guide on where to find the key on Bernard is a very important guide in the game, and some players don't know much about it. You can follow the editor to pay attention to the following content:
Bernard's key:
The key on Bernard can open the door to the Mathematical Tower. The key on Bernard's body is the ancient key.
You can use this key to open the underground level of the Mathematical Tower. Go to the top of the tower and defeat 5 robots (Bernard) to obtain the key and lighting ring to open the underground level.
Players can find a book in the Arcane Tower and find the secret words in it to talk to the robot, and then there is no need to fight.