SeedCrackerX Mod (1.21.6, 1.21.5) allows you to find out, or rather calculate, hack the seed of the server world, this is not an easy task, but it is possible and with the proper desire and sufficient time, you will get the seed of the world of the desired server. Dungeon cracking, fungus cracking don’t work anymore.
Source: SeedCrackerX Mod (1.21.6, 1.21.5)
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