All And Only Chests

Players get items only from chests inside generated structures. Block breaks drop nothing, most mob drops are disabled, and fishing loot is turned off. Blazes keep a 1% chance of a Blaze Rod, and that rod is still needed to reach the End, so finishing the game stays possible but becomes a real challenge rather than a routine grind.

The aim is a tight run: a player picks a structure, searches its rooms, opens the chests and gathers as many distinct items as that structure holds. Each structure keeps its own progress counter, and progress is saved when a player leaves the world or server, so a run can be resumed later where it was left off.

The mod is built for server play. Its commands open an inventory-style structure selection menu, set the active structure, show current progress, reset the progress and start a timer, with a choice of a set number of seconds, an hours-minutes-seconds value or a full time format. The timer's animated color gradient can be changed too. It runs on the server side only, so players join without installing anything.