Cracker's Wither Storm Mod

The Wither Storm grows by absorbing the blocks around it. It can track the nearest player from any distance and will occasionally chase them. Because it keeps loading its own chunks, it stays active even when no player is nearby, and the distant renderer lets players see it from far away.

Its appetite extends to clusters of blocks, including whole trees and villager houses, and to almost any mob. Both the mod and its server config are built in, with a config menu for adjusting behavior. The server config is unique to each world, so changes made in one save do not carry over to others. The mod is published for Forge and NeoForge across 6 release versions, 1.16.5 – 1.20.1, and it is not open source; All rights reserved applies to its code.

Client and server both need the mod, so the server and every player install it. Summoning the storm in an existing world can change that world permanently, so a backup is advisable before trying it on a save that matters.