Tribulation - Difficulty Overhaul

Mob strength is calculated from four independent factors: time, distance from spawn, depth and moon phase. The values are evaluated at the moment a mob spawns, and the four axes stack, so a mob far from spawn, deep underground, on a late night will be tougher than one near the start of a world. Tiered gear is added to match the scaling, and each vanilla mob type has its own tuned scaling rates and caps, so zombies do not scale the same way as skeletons or creepers.

Offsets can be set per dimension, per biome and per structure. The Nether receives a +25 offset and the End +40, while the Deep Dark adds +30 by default. Landmark structures such as ancient cities, end cities, nether fortresses, bastions, ocean monuments and trial chambers carry their own offsets, so the world fights back in named places. The offset system reads biome and structure tags and accepts modded content. The mod is a standalone overhaul with custom mobs and new dimensions, and it is open source under the MIT License.

The mod runs on Fabric for 1.21.1 and needs Fabric API, with the Fabric loader at 0.16.10 or higher. The server must run it, and players must install it too, so the environment is client and server. Settings persist across server restarts and can be toggled individually through Mod Menu and Cloth Config.