Keen Smell.
The troll has advantage on Wisdom (Perception) 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 troll's next turn. The troll dies only if it starts its turn with 0 hit points and doesn't regenerate.
Rage (2/day) 1min
The Troll has have advantage on Strength checks and Strength saving throws, +2 tdamage that use strength, The Troll has resistance to bludgeoning, piercing, and slashing damage.
Multiattack.
The troll makes one bite attack and claw attack depending on the number of arms it has.
Bite.
Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) piercing damage.
Claw.
Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.
Scimitar of Venom
Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 4) slashing damage and the target must make a DC 15 Constituion saving throw or take 2d10 poison damage and become poisoned for 1 minute.
Reattachment
As a bonus action the Troll can pick a limb and attach to himself
Leg: adds +1 to its dexterity score and +10speed
Arm: adds +1 to its strength score and +1 claw attack
Head: gains advantage on Wisdom (Perception) checks and on Saving Throws against being Blinded, Charmed, Deafened, Frightened, Stunned, and knocked Unconscious.
Keen Smell.
The troll has advantage on Wisdom (Perception) 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 troll's next turn. The troll dies only if it starts its turn with 0 hit points and doesn't regenerate.
Multiattack.
The troll makes three attacks: one with its bite and two with its claws.
Bite.
Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) piercing damage.
Claw.
Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.
Punch.
Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) bludgeoning damage.
When he takes 15+ slashing damage roll a d20 (AC:13 , HP:10)
1-10: Nothing else happens.
11-14: One leg is severed from the troll if it has any legs left. (unable to attack and speed of 5, The troll's speed is halved if it's missing a leg. If it loses both legs, it falls prone. If it has both arms, it can crawl. With only one arm, it can still crawl, but its speed is halved. With no arms or legs, its speed is 0, and it can't benefit from bonuses to speed.)
15- 18: One arm is severed from the troll if it has
any arms left. (speed of 5 and can make one claw
attack on its turn, with disadvantage on the attack roll unless the troll can see the arm and its target. Each time the troll loses an arm, it loses a claw attack.)
19-20: The troll is decapitated, but the troll dies only if it
can't regenerate. If it dies, so does the severed head. (If its head is severed, the troll loses its bite attack and its
body is blinded unless the head can see it. The severed head has a speed of 0 feet and the troll's Keen Smell trait. It can make a bite attack but only against a target in its space.)