When there's light there's bound to be darkness. Equally balancing each other. Before anything there was nothing and Hymirios himself represented nothingness. Darkness itself is his embodiment. If Helios is the one who brought life using light then Hymirios is the one who destroys using darkness. Using the force of gravity and dark matter, Hymirios desecates galaxies and kills every star, nebula, and solar systems he comes across. Balancing everything. If one dared to stand in his way, make sure you can withstand a force of a collapsing black hole right in front of you because Hymirios can summon black holes at his disposal to shred his opponents. Regulating light and darkness Helios and Hymirios will always make sure the balance of everything is achieved.