First, the Breeze. In Beta, it had a 10% chance to deflect arrows back at you . Bows became a death sentence.
"Here is the funniest bug: In Beta, Vaults didn't need a Trial Key. They just... opened. Every five minutes. Players built 'Vault Quarries'—strip mining for Vaults in Trial Chambers and looting them on a loop. Mojang patched it in 24 hours, but for one glorious morning, we were all rich."
Title: "What Minecraft 1.21 Looked Like in BETA (It Was a Mess)" Thumbnail Text: WIND CHARGES BROKE EVERYTHING minecraft 1.21 beta
"In Beta 1.21.0.21, the Breeze wasn't just annoying—it was a predator. Its wind charges would launch you 50 blocks straight up. No slow falling. Just you, the skybox, and a very painful re-entry. Players started carrying water buckets just to survive a single hit."
The Heavy Core originally had a 100% drop rate from the first Breeze in a chamber. People just killed one Breeze and reset worlds. First, the Breeze
Mojang removed "Trial Chamber Echoes" (ambient cave sounds) because Beta testers reported hearing phantom voices. Creepy stuff.
"Remember when the Mace was so overpowered it could one-shot the Ender Dragon? No? That’s because Mojang removed it before the full release. Welcome to the lost Beta of Minecraft 1.21." "Here is the funniest bug: In Beta, Vaults
Worst bug: The Bogged’s poison arrows could chain infect villagers. One swamp villager turned an entire forest green.