A Grey Seer is a Level 4 Wizard who uses spells from the Skaven Spells of Ruin and/or the Skaven Spells of Plague, and may replace one spell for either Skitterleap or The Dreaded Thirteenth Spell.
Source: Warhammer Fantasy: 8th Edition
A Grey Seer is a Level 4 Wizard who uses spells from the Skaven Spells of Ruin and/or the Skaven Spells of Plague, and may replace one spell for either Skitterleap or The Dreaded Thirteenth Spell.