  Lines in the spectrum of cosmic gamma rays are considered one of the more
robust signatures of dark matter annihilation. We consider such processes from
an effective field theory vantage, and find that generically, two or more lines
are expected, providing an interesting feature that can be exploited for
searches and reveal details about the underlying theory of dark matter. Using
the 130 GeV feature recently reported in the Fermi-LAT data as an example, we
analyze the energy spectrum in the multi-line context and find the data to be
consistent with a single $\gamma\gamma$ line, a single $\gamma Z$ line or both
a $\gamma \gamma$ and a $\gamma Z$ line.
