MobMorph

Killing a mob adds its form to the player's options, which the player can then take on. Each morph keeps the mob's own behavior, from the Creeper's explosion to the Enderman's teleport and the Witch's potions. Morphs also bring passive traits such as flight for the Bat and Phantom, underwater breathing for the Dolphin and Axolotl, wall climbing for the Spider, lava walking for the Strider and slow falling for the Chicken. Undead morphs burn in sunlight, as the real mobs do.

Hitboxes and movement speeds are set to match each mob, so a small morph can fit through tight spaces and a large one moves like its original. Animations follow the player's walking, swimming and flying. Predator mobs will hunt a player who is morphed as prey. The mod runs on NeoForge for Minecraft 1.21.1 and requires NeoForge itself. It runs on the client and the server, so both sides need it.