The Dreaded Thirteenth Spell

The Dreaded Thirteenth Spell is a unique spell ability for Grey Seers. It summons a unit of Stormvermin (Halberds), or a Stormvermin (Sword & Shield) when overcast, to the battlefield.
Since it is a unique spell, it is technically not a part of the Skaven Spells of Plague, Skaven Spells of Stealth or Skaven Spells of Ruin.
==Description==
The Curse of the Horned Rat is the dreaded 13th spell - the fabric of reality is torn and the Horned One’s children spill forth!
== Effect ==
* Type: Explosion
* Duration: 13 Seconds
* Cost: 20 Winds of Magic 
* Cooldown: 52 Seconds
* Target: Ground, enemy 200m
** Summons a unit of Stormvermin (Halberds)
** Summons a unit of Stormvermin (Sword & Shield) (overcast)
** Huge explosion area
** Can disrupt unit formation
** Strong vs. multiple units
** Summoned units degrade over time
Category:Unique spells
Category:Summon abilities