Ashera vs Obsidian: who would win?

Obsidian favored — Slight edge (~55%)

Ashera · Fire Emblem · Base

Tier

HIGH 6-A

Attack Potency

Multi-Continent Level

Speed

Massively Hypersonic

Durability

Multi-Continent Level

Obsidian · Steven Universe · Steven Fusion

Tier

HIGH 6-A

Attack Potency

Multi-Continent Level

Speed

Relativistic

Durability

Multi-Continent Level

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