Leonardo da Vinci (Assassin's Creed) vs Index Librorum Prohibitorum: who would win?

Index Librorum Prohibitorum favored — Slight edge (~55%)

Leonardo da Vinci (Assassin's Creed) · Assassin's Creed · Base

Tier

10-B, up to 8-C

Attack Potency

Human Level, up to Building Level+

Speed

Average Human, up to Supersonic

Durability

Small Building Level+

Index Librorum Prohibitorum · Toaru Majutsu no Index · Base

Tier

10-B, up to 6-B

Attack Potency

Human Level, up to Country Level

Speed

Average Human, up to Sub-Relativistic

Durability

Country Level

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