One Block to End All One Blocks is a quest-driven one block survival mod for Fabric 1.21.4. Start with a single block in a void world — break it, and it regenerates with a new drop based on your current phase. Work through 6 phases of escalating blocks, mobs, and quests to progress from a dirt hut to a full survival world built from nothing.
Features
6 phases with cumulative block pools — each phase adds new drops on top of the last 4 quests per phase tracking crafting, mining, kills, and inventory — progress is automatic via Minecraft's stat system Boss waves spawn at major phase milestones to keep you on your toes Quest Book (J key) with a full GUI — view active quests, block/mob pools, leaderboard, stats, and island management HUD overlay showing current phase and quest progress, with configurable position, scale, and toast notifications Multiplayer & Server Ready
Each player gets their own island, 250 blocks apart Visit other players' open islands with /oneblock visit Full team system — create a team, invite players, manage members Island merging — when two teammates physically build a bridge connecting their islands, the mod detects it automatically, advances both players to the next phase, and broadcasts the achievement server-wide Server Friendly
Auto-start on join (configurable), or players choose to start/spectate Admin panel for ops to manage player phases and resets in-game Fall safety net — players who fall into the void are teleported back PersistentState saving — all progress survives restarts Getting Started
Create a Superflat world using the Void preset. Break your block. Press J.
Required: Fabric API
