Double Trouble. Yegor and Yurgor (Henceforth referred to together as Bonecrusher) are an Ettin, a two-headed giant. Two heads sharing the same body. As such, they have Advantage on Wisdom (Perception) checks and on saving throws to maintain Concentration and against being Blinded, Charmed, Deafened, Frightened, Stunned, and knocked Unconscious. Additionally, they roll initiative separately and act on different turns.

Giantskin. Due to their immense size, Bonecrusher has resistance to damage from attacks made without advantage, unless the attack is from a magical weapon or by a creature larger than Medium, as its vital points are hard to hit.

Giant Endurance. The first time Bonecrusher would be reduced to 0 Hit Points, they instead fall to 24 Hit Points.

Tough. Bonecrusher gains an additional 2 Maximum Hit Points per hit die it has.

Siege Monster. Bonecrusher deals double damage to objects and structures.

Yegor's Hack-Axe. Melee Weapon Attack: +8 to hit, reach 10 ft., 1 target. Hit: 16 (2d10 + 5) Slashing damage. If Bonecrusher's Rage Song is active, a creature hit by this attack has disadvantage on its next attack or saving throw.

Yurgor's Crush-Club. Melee Weapon Attack: +8 to hit, reach 10 ft., 1 target. Hit: 15 (3d6 + 5) Bludgeoning damage. If Bonecrusher's Rage Song is active, a creature hit by this attack is pushed up to 10 feet away from them.

Snatch. Melee Weapon Attack: +8 to hit, reach 10 ft., 1 target. Hit: 14 (2d8 + 5) Bludgeoning damage, and the target is Grappled (Escape DC 16). If Bonecrusher's Rage Song is active, a creature grappled in this way is also Restrained.

Sample Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., 1 target grappled by Bonecrusher. Hit: 12 (3d4 + 5) Piercing damage, and the target has advantage on saving throws caused by the target for the next minute. Bonecrusher then spits the target out, causing them to land prone within 5ft of them. If Bonecrusher's Rage Song is active, they regain Hit Points equal to the damage dealt.

Toss. Bonecrusher picks up a tree or boulder and throws it. All targets in a 10-foot wide, 60-foot long line must make a DC 16 Dexterity Saving Throw or take 21 (3d10 + 5) Bludgeoning damage. A creature that succeeds on this saving throw takes no damage. Alternatively, Bonecrusher can throw a creature it is currently grappling at a single target. Both targets make the saving throw. If Bonecrusher's Rage Song is active, a creature that fails its saving throw against this ability is knocked Prone. 

Rage Song (Concentration). Bonecrusher begins a magical chant, recounting millennia of hunger and torment, evoking uncontrollable rage in all who hear it. Attacks made by creatures within 30 feet of it deal an additional dice of damage, but have disadvantage if the attacker doesn't speak Giant, Goblin or Orc. If Bonecrusher loses concentration on this song, they are Incapacitated until the end of their next turn.

Lash Out. When Bonecrusher succeeds on a saving throw against a spell or magical effect, it can move up to its speed towards the spell caster or make a melee attack against it.

Invoke Fury. When Bonecrusher is targeted with an attack by a creature affected by its Rage Song, it can force the attacker to make a DC 13 Wisdom saving throw. On a failure, the creature must instead randomly choose a different target or lose the attack. If they fail by 5 or more, Bonecrusher chooses the new target.