- Previewed". Crunchyroll. June 1, 2016.
Retrieved June 8, 2024. "Chaos Dragon:
Sekiryuu Sen'eki". VGMdb.
Retrieved June 8, 2024. "Jormungand
Season 2: Perfect...
- shadows.
Appeared only in the Bom Bom version. Koryuu, Hakuryuu, Seiryuu,
Sekiryuu (黒龍,白龍,青龍,赤龍)
Design basis:
Serpant Commanders of the
infantry troops....