🦈Notch wanted to add a non-attacking shark mob to Minecraft, but it was never implemented.
🔥The fire creeper was another mob Notch considered, which would leave trails of fire as it walked and create large bursts of flame.
👁️The creep stalker, inspired by SCP-173, was a mob that moved only when players weren't looking at it.
🗿The titan, a mega beast, was supposed to be a fun challenge for players, but it was not implemented in the game.
🦆Goblins, originally planned for Minecraft, would reward or punish players based on their treatment of the village.