Noragami - Clash, O Ye Gods of Calamity Noragami Special Comic; Noragami - Clash of The Gods of Calamity; Noragami - Clash, O Ye Gods of Calamity; ノラガミ アワセ禍神

Noragami Special,tells the story of the encounter between Yato and Magatsukami Rabou.> Spin-off of Noragami( http://www.batoto.net/comic/_/comics/noragami-r5014 )