This datapack adds the blood ent origin to the origins mod. This requires the fabric mod loader, the origins mod, and the fabric API for minecraft 1.17.

Powers:
Spawns in a crimson forest
When it kills, it regenerates health
Starts with two hearts, but as more mobs are killed it increases to the regular amount
Killing gives food, but it can't eat regularly. Also becomes hungry faster
Attacks inflict wither effect
When hit, you become immobilized for two seconds(you can still attack though)
You don't take knockback, but you have slowness 2
When in lava, effects are removed, and you gain hunger

Thanks to L P for suggesting this origin