Armored War Troll

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.

Medium Armor. The troll is encumbered by half plate armor, and as a result gains a disadvantage to all stealth checks, as well as +1 to AC (reflected in stat block).

Cleave. On the troll's turn, when it scores a critical hit with a melee weapon or when it reduce a creature to 0 hit points with a melee weapon, the troll may immediately make an attack roll against another creature within reach using the same weapon. Critical Cleave hits do not activate any additional attacks

Multiattack. The troll can make two attacks.

Giant Greatsword. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 14 (3d6 + 4) slashing damage.