Spellcasting. Glektod is a 4th-level spellcaster. His spellcasting ability is Intelligence (spell save DC 16, +5 to hit with spell attacks). Glektod has the following spells prepared:
Cantrips (at will): Eldritch Blast, Lightning Lure, Primal Savagery
1st level (6 slots): Create or Destroy Water, Cure Wounds, Healing Word
2nd level (4 slots): Barkskin, Scorching Ray
3rd level (2 slots): Elemental Weapon, Wind Wall

Shell Needles: When a creature successfully hits you with a melee attack, you can use your reaction to reduce the damage you take by 1d4, then the attacking creature takes 1d4 piercing damage.