Multiattack. Harkald makes two attacks.

Grab. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 19 (3d8 + 6) bludgeoning damage, and the target is grappled (escape DC 18). Until this grapple ends, Harkald can use Grab to attack another target, but they are not grappled.

Greatsword. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 19 (3d8 + 6) slashing damage, and Harkald can shove the target (as per the Shove action).

Rock. Ranged Weapon Attack: +9 to hit, range 60/240 ft., one target. Hit: 28 (4d10 + 6) bludgeoning damage. If you have a creature grappled, you may through them instead of a rock - the grapple ends, and the grappled creature automatically takes the damage of the throw, and lands within 5 feet of the target. You must roll to attack the target as per usual.

Harkald can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Acererak regains spent legendary actions at the start of his turn.

Attack. Harkald can use any of his Attack actions.

Flame Pull. Harkald summons the flames within him and pulls creatures towards him. Creatures within 60 ft must make a Strength saving throw (DC 15) or be dragged 10 ft towards Harkald and fall prone.

Rocks Fall. Harkald stamps the ground, and large rocks fall in a 15-foot-radius, 60-foot-high cylinder within 120 ft. Creatures in the cylinder must make a Dexterity saving throw (DC 15) or take (4d10 + 6) bludgeoning damage.