If you want to gain strong combat effectiveness in Ruins 2, you can only obtain some powerful equipment and other methods through your own operations. If you want to know the details of how to open the basement door of the Invisible One in Remnant 2, and use Remnant 2 to improve your combat effectiveness and make yourself stronger, then follow the editor of Sourcecode.com and take a look at this guide. I believe you can Give you the answer.
1. When the player comes to the basement for the first time, he needs to solve the two underground palace decryption tasks in the basement. After both decryptions are solved, the door to the basement can be opened.
2. The first one is a puzzle task that requires the player to rotate the pipe. The player can power up the pipe through the gap to decrypt it.
3. The second one requires players to use a manipulator to rotate the pillar.
4. The player waits for all three mechanical pillars to rotate to a position where they can stand. After jumping on the pillars, they can jump to the mechanical right hand, and then pick up the big sword to complete the decryption.