Materia Fusion Materia Fusion is a gameplay term in " Crisis Core - Final Fantasy VII - " . It allows Zack to fuse two Materia together to form a new Materia . Later in the game , the player can earn the ability to include items in the fusion as well to give the new Materia enhanced stat bonuses . Many rare Materia can only be acquired through Materia Fusion . Mechanics . Materia . When fusing Materia there are many possibilities depending on the type of each Materia , and if it is mastered or not . There are a few general guidelines : Items . Obtaining the Item Fusion Tome by completing mission 7 - 2 - 1 allows item fusion ; combining items with the fusion augments the resulting stat bonus . The stat boost of the resulting Materia can be changed depending on the type and number of items used . As the stat boost on an item increases , certain stat boosting items will have no effect . For example , five LCK Mako Stones can be used to increase LUK by 1 in a fusion , but if the LUK boost on a Materia exceeds 40 , adding more LCK Mako Stones to the mix will have no effect . Stat boosts . Fusing Materia can be used to give Materia excellent stat boosts . ATK , VIT , MAG , SPR and LUK max out at increases of + 100 on a single Materia , while HP , AP and MP max out at + 999 % per Materia . When fusing two Materia , the equation for the stat boost on the resulting Materia is as follows , where X is the higher stat boost between the two Materia and Y is the lower value : Thus , for example : If items are used in the Materia Fusion , regardless of what boost the items give , the resulting boost will be higher than it would normally . If the boost that would be granted by the items is higher than the boost of the two base Materia , the resulting Materia ' s boost is changed to that of the items . The base rules on which value is higher between the two Materia as explained above still apply . For example : If two Materia are fused that have different stat boosts , the resulting Materia will increase the stat that had the higher boost from the two base Materia . For example : In the event the two Materia had a + % boost and a + # boost , 10 % = 1 for purposes of determining which stat boost is higher and thus what stat boost the new Materia will have . The above rules all still apply if items are used in such cases . For example : Fusing . The player must choose two Materia to fuse , and the type and number of an item to include in the fusion ( the player can also choose to include no items ) . When the player selects the fuse command , a cost estimate will be given , showing what the product Materia will be , what stat boost it will have , and how many Soldier Points the fusion will cost in factors of both of the Materia used to fuse the desired result , and the amounts of items that are to be used in giving that Materia its statistic bonus ( the player cannot fuse Materia if they do not have enough SP ) . The player may then either cancel the fusion , or confirm it to complete the process and acquire their new Materia . Grades . Grade is what the game uses to weigh the " value " of one Materia against another . Grade 1 Materia are the lowest , grade 8 are the highest . Grades determine what the resulting Materia from a fusion will be , with the highest grade taking priority . For example , fusing a grade 2 Materia with a grade 5 Materia will result in a grade 5 Materia . Items can also determine the resulting grade , as items have grades . If a Materia is mastered , it adds + 1 to the grade level of the resulting Materia . If both Materia are mastered , the resulting Materia will have + 2 grade . Materia grades . Materia in bold / italic are the base grade of that particular Materia .