Scroll of Stone is an uncommon arcane item, added in Total War: Warhammer II Resurgent Update, to which the Assault of Stone spell is bound. The spell has a long range, bombards a medium area with major magical damage over a very short period of time and is more effective against a single unit with more than one combatant. It can be equipped by any racial lord or hero.
In TWW2 multiplayer, it is available for Prophetesses.
Many mages remember a spell from long ago that could move mountains: the Assault of Stone.