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Fusion

Devil Survivor

101Leafy researched the game for these rules. Every pair of the 116 demons follows them, and the fusion calculator works them out for you. Fusion calculator

How fusion works

  1. Two demons of different races make a demon of the race the chart below gives. The target level is the two base levels added, halved and rounded down, plus 1.
  2. The result is the lowest demon of that race with a base level at or above the target. When no demon of the race reaches it, you get the highest one.
  3. Two demons of the same race make the Element the chart shows for that race.
  4. An Element fused with a demon moves the demon one place up or down its race by level. Past the top or the bottom it fails. It never moves up to Metatron or down to Shiva.
  5. Two different Elements make a Mitama. The same Element twice fails.
  6. A Mitama fused with a demon gives back the same demon with 3 more points in one stat, up to 40. Two Mitamas fail, and so does a Mitama with an Element.
  7. Shiva, Metatron, and Lucifer come only from their special fusions.
  8. Twelve demons cannot be made until a story event opens them. A demon whose base level is above both the hero's level and the story's level cap cannot be made yet, and a unique demon cannot be made while one is already in your stock.

Race chart

Pick the row of one parent and the column of the other. The blue cells on the diagonal are the Element two demons of that race make.

MegamiDeityVileSnakeDragonDivineAvianFallenAvatarBeastWilderGenmaFairyTyrantKishinToukiJakiFemme
MegamiAquansAquansKishinDeityFairyJakiAvatarDivineFemmeSnakeGenmaFairyBeastWilderDeityToukiAvianFemmeFallen
DeityKishinFlaemisFlaemisTyrantDivineVileMegamiFemmeKishinJakiAvianToukiWilderSnakeVileFairyKishinTyrantDragon
VileDeityTyrantAerosAerosDeityTyrantAvianJakiAvianTyrantDragonFallenKishinToukiDeityJakiGenmaGenmaTyrant
SnakeFairyDivineDeityAquansAquansWilderMegamiVileMegamiDeityAvatarToukiMegamiBeastDragonDivineKishinAvatarFallen
DragonJakiVileTyrantWilderFlaemisFlaemisFallenFemmeBeastJakiJakiGenmaFallenFallenFallenGenmaWilderAvianGenma
DivineAvatarMegamiAvianMegamiFallenAerosAerosSnakeTyrantMegamiAvatarAvatarDragonAvatarVileFemmeBeastKishinMegami
AvianDivineFemmeJakiVileFemmeSnakeAerosAerosMegamiDivineGenmaSnakeDivineSnakeAvatarDeityBeastAvatarAvatar
FallenFemmeKishinAvianMegamiBeastTyrantMegamiErthysErthysToukiFemmeDragonTyrantDivineVileJakiAvianBeastDragon
AvatarSnakeJakiTyrantDeityJakiMegamiDivineToukiAquansAquansDivineJakiSnakeMegamiFallenDeityKishinFairyGenma
BeastGenmaAvianDragonAvatarJakiAvatarGenmaFemmeDivineFlaemisFlaemisToukiJakiFemmeDragonAvianFairyToukiFairy
WilderFairyToukiFallenToukiGenmaAvatarSnakeDragonJakiToukiErthysErthysVileAvianJakiFemmeSnakeDragonAvatar
GenmaBeastWilderKishinMegamiFallenDragonDivineTyrantSnakeJakiVileAerosAerosBeastVileSnakeAvatarAvianTouki
FairyWilderSnakeToukiBeastFallenAvatarSnakeDivineMegamiFemmeAvianBeastAerosAerosWilderVileBeastGenmaFallen
TyrantDeityVileDeityDragonFallenVileAvatarVileFallenDragonJakiVileWilderErthysErthysFallenSnakeFemmeWilder
KishinToukiFairyJakiDivineGenmaFemmeDeityJakiDeityAvianFemmeSnakeVileFallenAquansAquansFairyGenmaGenma
ToukiAvianKishinGenmaKishinWilderBeastBeastAvianKishinFairySnakeAvatarBeastSnakeFairyFlaemisFlaemisWilderFairy
JakiFemmeTyrantGenmaAvatarAvianKishinAvatarBeastFairyToukiDragonAvianGenmaFemmeGenmaWilderErthysErthysBeast
FemmeFallenDragonTyrantFallenGenmaMegamiAvatarDragonGenmaFairyAvatarToukiFallenWilderGenmaFairyBeastAquansAquans

Elements and races

Up moves the demon to the next higher demon of its race, down to the next lower one.

FlaemisFlaemisAquansAquansAerosAerosErthysErthys
MegamiDownDownDownDown
DeityDownDownDownDown
VileDownDownDownDown
SnakeUpUpDownDown
DragonDownUpUpUp
DivineUpUpDownDown
AvianUpUpUpDown
FallenUpDownUpDown
AvatarUpDownDownDown
BeastUpDownUpDown
WilderUpUpDownUp
GenmaDownUpUpDown
FairyDownUpUpUp
TyrantDownDownDownDown
KishinDownDownDownUp
ToukiUpDownDownUp
JakiDownUpDownUp
FemmeUpUpDownUp

Mitamas

Ara MitamaAra MitamaRaises St by 3FlaemisFlaemis + AerosAerosAquansAquans + ErthysErthys
Nigi MitamaNigi MitamaRaises Ma by 3AerosAeros + ErthysErthys
Kusi MitamaKusi MitamaRaises Ag by 3FlaemisFlaemis + ErthysErthysAquansAquans + AerosAeros
Saki MitamaSaki MitamaRaises Vi by 3FlaemisFlaemis + AquansAquans

Special fusions

ShivaShivaBarongBarong + RangdaRangda
MetatronMetatronRemielRemiel + KazfielKazfiel
LuciferLuciferMetatronMetatron + LokiLoki

Demons the story opens

These demons can only be fused after the battle or scene that opens them.

YamaYamaDay 5
PazuzuPazuzuDay 5
RemielRemielDay 7
KresnikKresnikA story scene
LokiLokiDay 7, Day 8
LuciferLuciferFree battle, day 7
MikazuchiMikazuchiDay 6, Day 7
ZouchouZouchouDay 7
KoumokuKoumokuDay 7
BishamonBishamonDay 7
KudlakKudlakA story scene
MetatronMetatronA story scene

Stats of the new demon

The new demon starts at its own base level and stats. Each parent then adds a bonus to each stat: half of what that stat grew from the parent's base level to its level now, plus 8 tenths of any points the parent got on top of that (from Mitamas, for one). The stats the parent's race grows fastest count 1 more in both parts.

Each stat stops at 40. The whole bonus stops at the new demon's level divided by 5, plus 5, with random points cut off to fit. Last, one random point moves from one stat to another.

Skill inheritance

Each parent passes on its 3 command skills and 3 passive skills. Repeats, and skills the new demon already has, drop out.

A skill that fits an empty slot of the new demon is learned at once. The rest go to a list of up to 6 of each kind, and you place them yourself. Slots holding the new demon's own skills cannot be overwritten. No skill is barred from inheritance.