Summon undead thrall spells

Summon Flesh Golem

Summon Ghast

Summon Ghoul

Summon Greater Zombie

Summon Grim Visage

Summon Necromite

Summon Poltergeist

Summon Shadow

Summon Skeleton Archer

Summon Skeleton Warrior

Summon Undead Dragon

Summon Undead Sheperd

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Summon Winged Horror