This leather-wrapped journal has a glittering rune in the shape of a lightning bolt on the cover. Written by Phileus Danforth, a Company-Sponsored wizard, the offputting tome smells like burned meat.
Only working on Evocation Spells on the Wizard spell list, the Harmful Surge Ritual allows the caster to treat the spell as being maximised (i.e. dealing maximum damage), but the caster also takes 1d4 points of unblockable damage per level of the spell, when the spell is cast.