  We explore a mechanism for producing the baryon asymmetry and dark matter in
models with multiple hidden sectors that are Standard-Model-like but with
varying Higgs mass parameters. If the field responsible for reheating the
Standard Model and the exotic sectors carries an asymmetry, it can be converted
into a baryon asymmetry using the standard sphaleron process. A hidden sector
with positive Higgs mass squared can accommodate dark matter with its baryon
asymmetry, and the larger abundance of dark matter relative to baryons is due
to dark sphalerons being active all the way down the hidden sector QCD scale.
This scenario predicts that dark matter is clustered in large dark nuclei and
gives a lower bound on the effective relativistic degrees of freedom, $\Delta
N_{\rm eff} \gtrsim 0.05$, which may be observable in the next-generation
cosmic microwave background experiment CMB-S4.
