This is a mod that allows you to "gib" mobs or you can say "make them explode to pieces of flesh", by default the only mobs that are set to have their "gib" state are zombies and players, however you can go to config ---> gib_config.json and modify and add new gibbable mobs and define other stuff.

HOW TO ADD / MODIFY NEW GIBBABLE MOBS :

go to config
find giblist.json first, add the REGISTRY name of the entity (so for example minecraft:pillager)
find gib_config.json, there already is a template you can copy and paste with the zombie entity to define stuff. you can modify the config in-game btw, just make sure not to hurt stuff so that it doesnt crash yo game.

Other stuff inside the config

you can set any particle you want in place of the default blood the mod provides (i reccomend extra gore, it looks cool af trust)
gib physics (EXPERIMENTAL), either way i've decided to make this to be true by default, what it does is turn gibs into "physics" objects (sort of).

(all the info that is talked about here has to do with V2.0 of jeff's gibbing)

also here is an example config (nightmare mode modpack v3.0 will use this)

{ "gib_life_time": 200, "gib_physics": "true", "gib_tick_stop": 60, "player_gibbing": "true", "player_gib_difficulty": 5, "player_bone_amount": 1, "player_flesh_amount": 3, "player_rib_chance": 1, "player_leg_chance": 1, "player_gib_innitial_velocity": 0.4, "player_gib_randomness": 25, "blood_particles": 16, "difficulty_minecraft:zombie": 6, "flesh_amount_minecraft:zombie": 2, "bone_amount_minecraft:zombie": 2, "leg_amount_minecraft:zombie": 2, "rib_amount_minecraft:zombie": 1, "head_chance_minecraft:zombie": 0.5, "blood_particles_minecraft:zombie": 16, "gib_innitial_velocity_minecraft:zombie": 0.4, "gib_velocity_increase_minecraft:zombie": 0.01, "gib_randomness_minecraft:zombie": 25, "difficulty_minecraft:husk": 6, "flesh_amount_minecraft:husk": 2, "bone_amount_minecraft:husk": 2, "leg_amount_minecraft:husk": 2, "rib_amount_minecraft:husk": 1, "head_chance_minecraft:husk": 0.5, "blood_particles_minecraft:husk": 16, "gib_innitial_velocity_minecraft:husk": 0.4, "gib_velocity_increase_minecraft:husk": 0.01, "gib_randomness_minecraft:husk": 25, "difficulty_minecraft:drowned": 6, "flesh_amount_minecraft:drowned": 2, "bone_amount_minecraft:drowned": 2, "leg_amount_minecraft:drowned": 2, "rib_amount_minecraft:drowned": 1, "head_chance_minecraft:drowned": 0.5, "blood_particles_minecraft:drowned": 16, "gib_innitial_velocity_minecraft:drowned": 0.4, "gib_velocity_increase_minecraft:drowned": 0.01, "gib_randomness_minecraft:drowned": 25, "difficulty_warrior:warrior": 6, "flesh_amount_warrior:warrior": 2, "bone_amount_warrior:warrior": 2, "leg_amount_warrior:warrior": 2, "rib_amount_warrior:warrior": 1, "head_chance_warrior:warrior": 0.5, "blood_particles_warrior:warrior": 16, "gib_innitial_velocity_warrior:warrior": 0.4, "gib_velocity_increase_warrior:warrior": 0.01, "gib_randomness_warrior:warrior": 25, "difficulty_mutantmonsters:mutant_zombie": 40, "flesh_amount_mutantmonsters:mutant_zombie": 8, "bone_amount_mutantmonsters:mutant_zombie": 4, "leg_amount_mutantmonsters:mutant_zombie": 3, "rib_amount_mutantmonsters:mutant_zombie": 3, "head_chance_mutantmonsters:mutant_zombie": 0.5, "blood_particles_mutantmonsters:mutant_zombie": 64, "gib_innitial_velocity_mutantmonsters:mutant_zombie": 0.3, "gib_velocity_increase_mutantmonsters:mutant_zombie": 0.01, "gib_randomness_mutantmonsters:mutant_zombie": 40, "difficulty_minecraft:zombie_horse": 7, "flesh_amount_minecraft:zombie_horse": 5, "bone_amount_minecraft:zombie_horse": 2, "leg_amount_minecraft:zombie_horse": 1, "rib_amount_minecraft:zombie_horse": 1, "head_chance_minecraft:zombie_horse": 0.0, "blood_particles_minecraft:zombie_horse": 64, "gib_innitial_velocity_minecraft:zombie_horse": 0.3, "gib_velocity_increase_minecraft:zombie_horse": 0.01, "gib_randomness_minecraft:zombie_horse": 40, "difficulty_minecraft:phantom": 7, "flesh_amount_minecraft:phantom": 2, "bone_amount_minecraft:phantom": 1, "leg_amount_minecraft:phantom": 0.0, "rib_amount_minecraft:phantom": 0.0, "head_chance_minecraft:phantom": 0.0, "blood_particles_minecraft:phantom": 32, "gib_innitial_velocity_minecraft:phantom": 0.3, "gib_velocity_increase_minecraft:phantom": 0.01, "gib_randomness_minecraft:phantom": 40 }