Bat Devil vs Hearthstone: who would win?

Bat Devil favored — Slight edge (~55%)

Bat Devil · Chainsaw Man · First Incarnation

Tier

HIGH 8-C

Attack Potency

Large Building Level

Speed

Supersonic

Durability

Small Building Level

Hearthstone · Percy Jackson · Base

Tier

HIGH 8-C

Attack Potency

Large Building Level

Speed

Superhuman

Durability

Human Level, up to Large Building Level

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