The 2012 stone obstacle, often called the Beta Stone, is considered the rarest obstacle in Clash of Clans history. It appeared only in the game's earliest experimental versions in 2012 before being retired, meaning it can no longer spawn in new villages.Only a handful of legacy players (estimated around 170) are known to still possess it.While the 2012 Clashmas Tree is also extremely rare (held by roughly 1,200 players), the Beta Stone remains the most elusive collectible due to its exclusive availability during the game's launch phase.