Lummobs!

Each of the six mobs fights differently. Slab Turtles bounce off other mobs and deal extra knockback when they hit something. Cannonheads fire fireballs at range, so the player has to dodge instead of closing in. Cacus latch on and keep chomping until the player is slowed to a halt and cannot move at all. Oni spawn deep underground, where they stay docile until something provokes them.

Monsoons are the largest of the group. They levitate the player and strike with lightning, and their smaller companions, the mini-Monsoons, fly the player around and blink to a new spot when attacked. The mod requires Geckolib, which must be installed alongside it on Forge. Lummobs! runs on client and server, so both the server and every player need it. Files are published for Forge 1.20.1 only, with 1.1.1 as the latest build from 2024-04-10, and the mod is released under All rights reserved, so it is not open source.