What is the name of the song when Yato uses Yukine to cut through the Pacification Ring to rescue Ebisu in episode 13 in Noragami Aragoto?
If you're talking about the flashback scene that starts around 4:59, this is "Reincarnation" (Noragami Aragoto OST, disc 1, track 8). Here is an extract from the track (0:45-1:00).