The Flood vs Marian Slingeneyer: who would win?

Too close to call

The Flood · Halo · Base

Tier

9-C, up to 3-C

Attack Potency

Street Level, up to Galaxy Level

Speed

Average Human, up to Massively Ftl+

Durability

Street Level, up to Building Level

Marian Slingeneyer · Toaru Majutsu no Index · Base

Tier

9-C, up to HIGH 1-C

Attack Potency

Street Level, up to High Complex Multiverse Level

Speed

Average Human, up to Supersonic

Durability

Street Level

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