A Petrified Sorcerer is often carried aloft in battle by the Acolytes of Hashut.
Source: Warhammer Armies Project: Unofficial 9th Edition (v2.2)
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The Petrified Sorcerer should be mounted on a 40x40mm base, has Unit Strength 4 and may make two supporting attacks. It may not leave its unit for the duration of the game, and is always placed in the second rank of the unit, as centrally as possible. While there are rank and file models left in the unit (except the Command Group), always remove one in preference to the Petrified Sorcerer taking a wound (it is assumed that if one of the bearers falls, another rank and file model steps in). Only when the rest of the unit has been killed does the Petrified Sorcerer start taking wounds, even in close combat. A unit carrying a Petrified Sorcerer gains +1 to their Combat Resolution Bonus, the Fear and Magic Resistance (2) special rules.