Freezing Spell

 increases the slots available to Reading Spellbook. When spells are frozen, SP slowly drains depending on the number of spells. Each level increases the available slots by 4.

Patches

 * Patch (2018 Aug. 01)
 * Warlock's Freezing Spell Max Lv is increased from 5 to 10.
 * Patch (2009 Nov. 04)
 * The maximum preservation points that can be saved as Freezing Spells have been changed to increase by the caster's base level and INT.