The Cannibal Mod for 1.7.2 adds knives that give you the ability to cut parts from villagers, animals, and other players. You can then eat these parts to gain health.
Knifes: Shift-right clicking them will cause the user to take 2.5 – 3 hearts of damage and drop one piece of their flesh.
Additionally, right-clicking on other mobs that would normally drops food (including villagers) will cause them to drop their respective meat.
They will take damage:
Cows: 1.5 – 2 hearts of damage.
Chickens: Set to kill the chicken as they drop their bodies as food.
Pigs: 1.5 – 2 hearts of damage.
Villagers: 2.5 – 3 hearts of...