In search of the Heavens feel

The story follows around Ezekiel von Einzbern and his journey to find his grandparents Shirou Emiya and Illyasviel von Einzbern in order to learn tracing and alchemy to avenge his mother who was killed by devils(probably) in order to get the grail. high-school dxd x fate series x fire emblem x ????? crossover fanfiction