Kuroyoru Umidori vs Mazdamundi: who would win?

Kuroyoru Umidori favored — Favored (~65%)

Kuroyoru Umidori · Toaru Majutsu no Index · With Extra Arms

Tier

8-A, up to 7-C

Attack Potency

Multi-City Block Level, up to Town Level

Speed

Peak Human, up to Supersonic

Durability

Street Level, up to Town Level

Mazdamundi · Warhammer Fantasy · Base

Tier

8-A, up to LOW 2-C

Attack Potency

Below Average Human Level, up to Universe Level

Speed

Immobile

Durability

Multi-City Block Level, up to Large Star Level

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