Coagulated Troll

Keen Smell: The troll has advantage on Wisdom (Perceptions) checks that rely on smell)

Regeneration: The troll regains 10 hit points at the start of its turn. If the troll takes acid or fire damage this trait doesn’t function at the start of the trolls next turn. The troll only dies if it starts its turn with 0 hit points and doesn’t regenerate.

Coagulation: After dropping below half health the troll has enough hardened blood plastered to its body it becomes harder to penetrate through causing the troll's AC to be raised by +2. If it regenerates above half health again this trait doesn’t apply again until a long rest.

Pincushion: Have a creature roll a strength save or be restrained by the troll. On a success nothing happens. On a fail the creature is pulled into the wooden stakes embedded in the troll taking (2d6) piercing damage. At the end of the restrained creature's turn it can make a DC 14 STR save to see if it can push itself free. If not the creature remains attached to the troll until it’s able to free itself. Only one creature can be restrained at a time.

Multiattack: The troll makes three attacks: One with it’s bite and two with its claws or it can

Bite: Melee weapon attack: +7 to hit, reach 5ft, one target. Hit: 7 (1d6+4) piercing damage

Claw: Melee weapon attack: +7 to hit, reach 5ft, one target. Hit 11 (2d6+4) slashing damage