Once at this point it is a matter of time until they are fully self aware and wish to experience the world on their own terms and as such get a body of their own design. These synths do not owe anyone or anything their life as their time building things generally covers any materials required for making their crystalline mind and body. The mind itself is infused with various species magics and each Synth resonates with those various magics differently, but most resonate heavily with the changeling magic that is part of their core. Due to this some look like machines, some look like heavily augmented organics, and others look no different from a stranger you’d pass on the street.
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