Three-demon fusion

Three-demon fusion, also called triad fusion, triple fusion or ternary fusion is a type of fusion which requires three demons as components. In Megami Tensei II, Shin Megami Tensei, Shin Megami Tensei II and Shin Megami Tensei if..., three-demon fusion uses separate fusion charts which differ from the conventional two-demon fusion. The race of a demon created through triple fusion is determined by the species of the demons that are selected for the fusion rather than their respective races as in two-demon fusion.
In Shin Megami Tensei, three-demon fusion is important due to the fact that demons of several races, such as Deity, Tyrant, Seraph and Vile, cannot be created through two-demon fusion. In Shin Megami Tensei II and Shin Megami Tensei if..., three-demon fusion almost always creates Light or Dark demons, though a few combinations can yield completely random results.
Three-demon fusion is not to be confused with the sacrificial fusion found in Shin Megami Tensei III: Nocturne, which employs much simpler methods and acts as a modification of normal two-demon fusion.
==Appearances==
*Megami Tensei II
*Kyuuyaku Megami Tensei
*Shin Megami Tensei
*Shin Megami Tensei II
*Shin Megami Tensei if...
*Shin Megami Tensei NINE 
*Shin Megami Tensei IMAGINE
*Devil Summoner: Soul Hackers
==Common rules==
* The order in which the ingredient demons are chosen is usually irrelevant.
* One can determine the intermediate result in the first fusion chart by the species of two lowest level ingredients among three.
** If there are two demons that are tied for the highest level, the "lower" species will be used for the first chart.
* In the second fusion chart, combine the intermediate result with the ingredient species of the highest level to get the resultant race.
* If the two ingredients for the first fusion chart share the same species, the end result will be the one rank higher demon of the same race of the third ingredient.
===Megami Tensei II rules===
* Only Good Alignment demons can be used in Three-demon fusion.
* Three-demon fusions are the only way to get Kishin and Divine race demons.
===Shin Megami Tensei rules===
* Expected resultant level is the average of all three ingredients plus 8.
* Use the calculated level to locate the demon of the expected race just higher than the expected level.
===Shin Megami Tensei II and Shin Megami Tensei: if... rules===
====Without Dark ingredient demon====
* Expected resultant level is the average of all three ingredients and then revised by any of the following rules:
** If all three ingredients are Neutral, minus 4.
** One Light demon, no change.
** Two Light demons, plus 4
** Three Light demons, plus 8
* Use the calculated level to locate the demon of the expected race.
** Whether the higher or lower demon should be picked is determined by the protagonist's level.
*** If the protagonist's level is higher than the expected level, higher level demon will be picked, or vice versa.
====With Dark ingredient demon====
* One Dark demon: determine the expected demon by other two ingredients with two-demon fusion chart and pick the demon of one rank higher, then fuse again with the Dark demon with two-demon fusion chart.
* Two Dark demons: determine the expected demon by the two Dark ingredients with two-demon fusion chart and pick the demon of one rank higher, then fuse again with the remaining demon with two-demon fusion chart.
* Three Dark demons: result will be three ranks higher than the highest level Dark ingredient demon of the same race.
===Shin Megami Tensei IMAGINE rules===
* Three-demon fusion can only be performed normally by three different players with demons at friendships of good friends or higher. Only the host of the fusion receives the resulting demon.
* Demons with friendships of Open Hearts or higher have a small chance of resulting in a demon crystal for the demon in question. 
* In order to perform a solo three-demon fusion, players must visit the cathedral in Ikebukuro, have demons at maximum friendship, and pay a blood stone for each attempt. 
Category:Mechanics
Category:Megami Tensei II
Category:Shin Megami Tensei
Category:Shin Megami Tensei II
Category:Shin Megami Tensei: if...
Category:Shin Megami Tensei IMAGINE