Minecraft, but Mobs Grow As You Play

A world clock ticks in the background from the moment you load in. Every four minutes it advances a growth stage, and every hostile mob that spawns from that point on is taller, healthier, faster and hits harder than the one before it. By stage ten a zombie is two and a half blocks of muscle with six times the health and almost triple the damage. Mobs already in the world keep the size they spawned at, so your early-game cave is a museum of how small things used to be. Kill the big ones and they pay out in bonus XP and rare bounty loot.

How it works

• A scoreboard clock counts every tick the world runs. Every 4 minutes it advances the growth stage by one, up to a maximum of stage 10 after roughly 40 minutes of play.
• Twice a second the pack sweeps the Overworld, Nether and End for hostile mobs it has not touched yet, tags them, and stamps the current stage onto them as attribute modifiers.
• Each stage applies a scale, max_health, movement_speed and knockback_resistance modifier, plus attack_damage for melee mobs. Stage 10 mobs are 2.5x tall with 6x health and 2.8x damage.
• Because raising max health does not refill a mob, every scaled mob is immediately topped up to full so a giant zombie actually arrives with its giant health bar.
• Mobs keep whatever size they spawned at forever. The pack never re-scales an existing mob, so the world becomes a visible timeline of when each thing crawled out of the dark.
• Killing a tagged hostile awards bonus XP that scales with the stage, and from stage 6 there is a 15% chance of a bounty drop from a custom loot table.

Installing it

1. 1.Download the zip below. Do not unzip it — Minecraft reads the zip directly.
2. 2.In Minecraft, click your world, then Edit, then Open World Folder.
3. 3.Drop the zip into the datapacks folder inside that world.
4. 4.Load the world. Run /datapack list to confirm it is enabled.

Written by MineSpecs and released under CC0 — public domain. Use it, change it, ship it in a modpack, no attribution required. Pairs well with our mods, shaders and resource packs.