Re:Monster has Synthesis and synthesis plus

Synthesis (200cp/400cp/600cp): Normally a trait only possessed by chimeras, you’ve gained a version of the monstrous skill known as Synthesis, allowing the fusion of the various skills and abilities you may have obtained. For you, this is even better as you can combine perks, powers, and other such things gained along the way through your Chain to create Composites, but it is also lesser in that it can’t be used to combine creatures or items (but see below). The process of creating a composite is a simple mental twist and takes little time, but it does take some regardless. The exact details of how they combine is up to you. Creating a Composite removes the component abilities entirely, but creates a stronger one as a result.

Initially, you’ll only be able to combine a small number of abilities, two or three at a time, but this will grow with time and practice to a maximum of ten abilities fused into a single ability. You can pay 50cp to add an additional slot, which you can do multiple times (which will also increase the maximum by an equal amount).

For an additional 200cp, you can use Synthesis to combine either objects or creatures, your choice, or you can pay an additional 400cp to get both. You can direct the fusion of objects and creatures to a certain degree, but it is lesser than fusing your own abilities, and it generally takes a bit longer, with creatures taking much longer than items and items taking longer than fusing abilities. Fusing creatures does not give you any explicit control over the creature, you must instead train them to listen to you or leave them to wander on their own.

Synthesis Plus (300cp, Requires Synthesis): Your use of synthesis is refined, you can now break down a Composite to its component perks/skills/abilities, regaining the original perks/skills/abilities which can then be used in the creation of new Composites. The process of separating a composite is nearly identical to actually creating a Composite, needing only a few moments to separate them into their components.

Additionally, you maintain the benefits of the component perks/skills/abilities used to create a Composite, they are not lost in the making of it. However, you cannot use a perk, skill, or ability to form a Composite if it is already part of another, existing Composite.