Advancement Multiplier Mod

Each tracked advancement doubles the drop multiplier, so the multiplier follows 2 to the power of the number of advancements completed. The mod tracks 120 advancements across the Adventure, End, Husbandry, Nether and Story tabs, and the multiplier reaches 4.6 quintillion once all of them are earned. The multiplier applies to loot from mob kills, block breaks, fishing and chests. Beds, doors and tall plants drop multiplied items too, with the other half of a two-block object counted as covered. Drops from a cascade of broken blocks are corrected so they are not multiplied twice.

Servers that run it need every player to install it too. A bossbar shows the current multiplier at all times, with values formatted in K, M, B, T, Q and Qi. Scoreboard objectives for the advancement count and the multiplier maximum are created automatically for datapack use. Player death drops are never multiplied, and multiplier stacks survive a save or reload through a codec range patch. A resync command, advmultiplier recalculate, forces a full recount if the multiplier ever falls out of step.

The mod is published for Fabric only, with 1.0.4 for 26.3 as the latest file on 2026-10-14. The code is open source under the MIT License, and source code is public.