Sacrificial Summoning Magic

Summoning Magic is a Caster Magic which allows the user to summon other beings.

Description
This magic allows the user to summon other beings, and is able to summon enough power to call forth Ikusa-Tsunagi, a God of titanic proportions. The user can do so without the need to perform any gesture or draw any glyph. The process affects a large portion of the sky above the user, enveloping it in a gigantic swirl of Magic.