Clay Kaczmarek vs Nightsider: who would win?

Clay Kaczmarek favored — Slight edge (~55%)

Clay Kaczmarek · Assassin's Creed · As a human

Tier

9-A

Attack Potency

Small Building Level+

Speed

Supersonic+

Durability

Small Building Level+

Nightsider · Warhammer 40,000 · Base

Tier

9-A

Attack Potency

Building Level+

Speed

Average Human, up to Speed Of Light

Durability

Human Level

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