Amatsu-Mikaboshi (天津甕星 lit. August Star of Heaven) is an Izanagi Magic Seals spell.
Amatsu-Mikaboshi is among Atrax's strongest spells, and a Tenjho Class spell declared second to Zōka Sanshin in terms of power and the amount of magic energy used. The spell is executed when Atrax creates a magic seal which is accompanied by a small sphere of immense æther. The sphere collapses releasing the æther in the form of a bright light. In comparison to the Zōka Sanshin, the range of Amatsu-Mikaboshi is far smaller, however, the spell still consumes such a large amount of magic energy that it can only be used on few occasions.