Pick two or three demons to see what the Cathedral of Shadows makes from them, or pick a demon to see every pair of two demons that makes it. 101Leafy researched the game for the rules, so the calculator checks them in the game's own order, fusion accidents included.
What they make
Ways to make a demon
Every pair of two demons that makes it, lowest levels first. Pairs of two elementals, pairs with a human, and Slime are left out, since their result depends on the hero level or is random.
Rules
A demon on the ban list fails right away. The Machine, Vaccine, and Virus demons are all on it.
The special recipes come first, then Slime, which gives the other demon back.
Two demons of one race: a light race gives a set demon, a dark race gives a demon of another race at about their average level plus 2, and two elementals give a race from the elemental table.
Two races of one group give a demon of that group at about their average level plus 3.
A human (Messian, Gaean, or Fighter) with a demon of another group gives a random demon whose alignment depends on both of them.
An elemental moves the other demon up or down its race. A dark demon moves one of the two, or causes an accident.
Everything else uses the race chart: the lowest demon of the result race at or above the average level plus 3, or its top demon.
Some results only come out after a point in the story. A result can't be one of the demons fused, can't already be in the party, and can't be above the hero's level.
After you confirm a fusion there is a 1 in 256 chance that the result changes to a random demon from 10 levels below the hero to 15 above. The calculator shows the normal result.
Race chart
Two demons of the races in the row and column make a demon of the race shown. Where both races share a group the group rule applies, and the same race square gives the set demon.
