  We explain the recent diphoton excesses around $750$ GeV by both ATLAS and
CMS as a singlet scalar $\Phi$ which couples to SM gluon and neutral gauge
bosons only through higher dimensional operators. A natural explanation is that
$\Phi$ is a pseudo-Nambu-Goldstone boson (pNGB) which receives parity violation
through anomaly if there exists a hidden strong dynamics. The singlet and other
light pNGBs will decay into two SM gauge bosons and even serves as the
meta-stable coloured states which can be probed in the future. By accurately
measuring their relative decay and the total production rate in the future, we
will learn the underlying strong dynamics parameter. The lightest baryon in
this confining theory could serve as a viable dark matter candidate.
