Holy Grail War (Standard) (v1.0)

The darkened sky showed a blood moon. A rare occurrence that many people found it fascinating, regardless the place where they came from. However, you knew you were a partial cause to it. Someone told you to perform this ritual. Someone who didn't present itself to you. Your very own eyes glowed as the magic rune on the floor subsided. Pieces of paper flying around blocked your path as a form materialized before you.
You didn't know what circumstances have occured for you to receive that letter, let alone, be doing this.
"..." Unbeknownst to you, something has finally started.