Uploaded December 2021 | Updated September 2026, 3 hours ago

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In cooperation with Carl Hoff, I am proud to present Bubblism521.
This is a very rare and interesting puzzle. If your collection does not have this puzzle, this is a great chance to get this weird and wonderful puzzle!!!

forum link - twistypuzzles.com/forum/viewtopic.php?f=15&t=28185

If you are interested in my puzzles - please visit my Shop:
grigorusha.com