The Great Horned Rat vs Luminous Being: who would win?

Luminous Being favored — Slight edge (~55%)

The Great Horned Rat · Warhammer Fantasy · Avatar within the Warp

Tier

1-A

Attack Potency

Outerverse Level

Speed

Immeasurable, up to Omnipresent

Durability

Outerverse Level

Luminous Being · Dungeons & Dragons · Base

Tier

1-A

Attack Potency

Outerverse Level

Speed

Omnipresent

Durability

Outerverse Level

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