A Dyna-Host is a baseline who is host to a Dynamorph. The situation is somewhat similar to the mutant Avatar Trait, but there are very significant differences, which are not well-defined at present. The bonding grants the host super-powers. Those powers are apparently not magical in nature, as Avatar powers are, since Dynamorphs aren't magical themselves and "do not mix well with magic". Dynamorph bonding seems to be a recent phenomenon. The first confirmed Dyna-Host was Bristol Marvel, in Great Britain, in 1934. Most of this information comes from the second chapter of Silver Linings.