Multiattack. The necromancer makes three Arcane Burst attacks.

Arcane Burst. Melee or Ranged Spell Attack: +7 to hit, reach 5 ft. or range 120 ft., one target. Hit: 25 (4d10 + 3) necrotic damage.

Summon Undead (1/Day). The necromancer magically summons five skeletons or zombies. The summoned creatures appear in unoccupied spaces within 60 feet of the necromancer, whom they obey. They take their turns immediately after the necromancer. Each lasts for 1 hour, until it or the necromancer dies, or until the necromancer dismisses it as a bonus action.

Grim Harvest (1/Turn). When the necromancer kills a creature with necrotic damage, the necromancer regains 9 (2d8) hit points.