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.

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. Cleave hits do not activate any additional attacks.

intimidating Presence. At the start of the war troll's first turn, he unleashes a intimidating roar. Any enemy that has not had a turn in the current combat and can hear him must make a Wisdom saving throw. The DC is determined by the war troll's Intimidation check. The war troll can only use this ability one more time targeting any enemy within 30 feet. A target who fails the saving throw is fightend until the end of the war trolls next turn as long as he is more than 30 feet away or out of line of sight.

Multiattack. The troll makes two giant Greatsword attacks.

Giant Greatsword. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 6) slashing damage.

Aggressive. As a bonus action, the Wartroll can move up to its speed toward a hostile creature that it can see.

Cleave. The war troll can use its reaction to make a melee attack against a creature that moves within its range at least 5 feet. If it succeeds in the attack, it can use the same rolls as before to attack another creature that is within 5 feet of the first target. The AC of the second target increases by +1, and this number also increases by +1 for each additional target. The troll can only attack a maximum of 4 targets this way (including the original target). if one of the targets is not hit by the attack, this target interrupts the cleave. Cleave hits do not activate any additional attacks.