Nightsider vs Oreioth: who would win?

Oreioth favored — Slight edge (~55%)

Nightsider · Warhammer 40,000 · Base

Tier

9-A

Attack Potency

Building Level+

Speed

Average Human, up to Speed Of Light

Durability

Human Level

Oreioth · Dungeons & Dragons · Base

Tier

9-A

Attack Potency

Small Building Level+

Speed

Hypersonic+

Durability

Small Building Level+

A heuristic estimate from normalized VS Battles Wiki stats: tier, attack potency, speed and durability.