Mushoku Tensei has two power systems running in parallel: elemental magic (ranked by tier and casting method) and swordsmanship (three schools at god-level mastery).

Magic Ranks

RankLevel
Beginner / Intermediate / AdvancedStandard levels achievable with study
Saint-classTop 1% of mages. Most court mages never exceed this.
King-classLegendary level. Rudeus reaches this as a child.
Emperor-classLiving legends. Only a handful exist per generation.
God-classFigures of myth — Laplace, Orsted. Rewrites reality.

Three Swordsmanship Schools

Sword God Style

Pure offense. The strongest attacking style — sacrifices defense for overwhelming striking power. Eris and Ghyslaine's school.

Water God Style

Pure defense and counter. Reads any attack and turns it against the attacker. Paul's school. The hardest to master.

North God Style

Psychological warfare and dirty tricks. Unpredictable techniques designed to work on both mages and warriors simultaneously.