Actions

Multiattack Ornstein makes two Spear attacks.
Spear Melee Weapon Attack: +11 to hit reach 10 ft., one target. Hit: 1d8+5 piercing damage, plus 6d8 lightning damage.
Lightning Tackle (Recharge 5-6) Ornstein streaks across the ground towards his enemy, clearing everything in his way. Ornstein moves 30 ft. in a straight line. Any creature in that line must make a DC 19 Dexterity Saving Throw. On a failed save, the creature takes 1d8+5 piercing damage and 6d8 lightning damage, or half as much damage on a successful save. 

Legendary Actions

Ornstein can take 3 Legendary Actions, choosing from the options below. Only one Legendary Action can be used at a time and only at the end of another creature's turn. Ornstein regains spent Legendary Actions at the start of his turn.

Swift Dodge : When Ornstein is hit by an attack, he can move up to 10 ft. away from the attacker without provoking Opportunity Attacks by the same enemy.
Lightning Ball : Orstein shoots a ball of Lightning from the tip of his spear. One target within 60 ft. must succeed on a DC 17 Dexterity Saving Throw or take 6d8 lightning damage.
Fallen Comerade (Costs 3 Actions) : If Smough falls dead, Ornstein may touch him and absorb his power. Ornstein's size becomes Large, he gains 30 temp HP and all of his weapon attacks deal an additional 4d6 bludgeoning damage. These effects last for 10 minutes.