Gil-galad vs Ice King (Adventure Time): who would win?

Ice King (Adventure Time) favored — Slight edge (~55%)

Gil-galad · Lord of the Rings · Base

Tier

HIGH 7-A, up to HIGH 3-A

Attack Potency

Large Mountain Level, up to High Universe Level

Speed

Supersonic+, up to Massively Ftl+

Durability

Large Mountain Level, up to High Universe Level

Ice King (Adventure Time) · Adventure Time · Season 3

Tier

HIGH 7-A

Attack Potency

Large Mountain Level

Speed

Massively Hypersonic+

Durability

Large Mountain Level

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