Dark Discharge. When the Stormwarden Spellcaster is hit by a melee attack, the attacker must roll a DC 13 Constitution saving throw or be stunned until the end of their next turn. 

Undead Fortitude. If damage reduces the Stormwarden Spellcaster to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the zombie drops to 1 hit point instead.

Spellcasting. The Stormwarden Spellcaster is a 5th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 13, +3 to hit with spell attacks). The Stormwarden Spellcaster has the following cleric spells prepared:

Cantrips (at will): gust, lightning lure, thaumaturgy, ray of frost

1st level (4 slots): shield, thunderwave, witch bolt

2nd level (3 slots): gust of wind, warding wind

3rd level (2 slots): lightning bolt, tidal wave

Dagger. Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 20/60 ft., one creature. Hit: 4 (1d4 + 2) piercing damage.