To create a troll, take up pliers and empty the head of teeth.
Into each bleeding socket insert a talon of glass. Many will break - this is why most trolls cannot speak, tongues a mess of ruined scraps.
Remove the finger-nails and replace them with blades of glass. Many will break - this is why most trolls cannot use tools, fingers rent apart.
As the glass cuts them, they grow. As they grow, the glass cuts them.
This is why their wounds close in minutes. This is why they always hunger.
This is one of the paths a man could walk to leave mortality behind.
HD 4 / AC as Leather / Damage 1d6
Re-rolls HP at the beginning of each round.