Rimuru’s Ultimate Skills Explained: A Deep Dive into His God-Tier Abilities

When you follow That Time I Got Reincarnated as a Slime, there’s a moment where you stop thinking of Rimuru Tempest as “just a slime who got lucky” and start realizing he’s something entirely different.

As a fan, that transition hits hard—because his growth isn’t just about getting stronger, it’s about rewriting what “strength” even means in that world.

His Ultimate Skills are the clearest proof of that evolution. They’re not just powers; they feel like system-level commands over reality itself.

And that’s what makes Rimuru one of the most fascinating overpowered protagonists in modern isekai storytelling.

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The Core Idea: Ultimate Skills as Rules of Reality

In TenSura, Ultimate Skills are not simple abilities. They represent authority over fundamental concepts like space, destruction, knowledge, and bonds. What makes Rimuru unique is that he doesn’t just acquire them—he integrates them into a single evolving system.

Instead of stopping at one peak ability, he continuously builds a layered structure of powers that interact with each other, almost like a living framework for reality manipulation.

Raphael – The Brain Behind the Monster

Raphael is arguably the most important part of Rimuru’s evolution. Originally developed from the Unique Skill Great Sage, it becomes a semi-autonomous intelligence that handles analysis, strategy, and optimization at a level no human mind could match.

Main Functions of Raphael

Raphael operates like a divine processor embedded within Rimuru’s soul, constantly calculating outcomes and refining decisions in real time.

• Thought Acceleration – Drastically increases cognitive processing speed.
• Analytical Appraisal – Breaks down enemy abilities and structures instantly.
• Parallel Operation – Handles multiple complex tasks simultaneously.
• Synthesis/Separation – Combines or decomposes skills and materials.
• All of Creation – Grants understanding of nearly any phenomenon.

What makes Raphael fascinating is its contrast with Rimuru’s personality. While Rimuru is often casual and humorous, Raphael is cold, precise, and completely logical, creating a perfect balance between intuition and calculation.

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Beelzebuth – The Hunger That Consumes Everything

Beelzebuth represents the concept of absolute consumption. It is not just about eating matter—it is about absorbing energy, souls, and even abilities into Rimuru’s existence.

Core Abilities

• Predation – Absorbs targets into an internal dimensional space.
• Soul Consume – Destroys and assimilates spiritual existence.
• Food Chain – Shares and inherits abilities through subordinates.
• Stomach – Infinite storage space for all absorbed matter.

Beelzebuth feels unsettling when examined closely. It is not pure destruction, but assimilation—everything eventually becomes part of Rimuru’s system.

Uriel – The Power of Bonds and Protection

Uriel is fundamentally different from Beelzebuth. Instead of consuming, it protects, stabilizes, and reinforces Rimuru’s connections with allies and territory.

Main Abilities

• Spatial Domination – Full control over spatial coordinates and teleportation.
• Multidimensional Barrier – Defense that bypasses conventional attack logic.
• Infinite Prison – Seals enemies within isolated space.
• Law Manipulation – Influences physical forces like gravity and inertia.

Uriel represents Rimuru’s role as a leader. It is not just power for combat, but power for preservation.

Veldora and Velgrynd – True Dragon Authority

Rimuru’s connection to the True Dragons transforms him from a powerful individual into a being tied to cosmic entities. These skills reflect relationships turned into authority.

Veldora – Storm Power

• Storm Dragon Summon – Calls Veldora into battle.
• Storm Magic – Lightning, wind, and destructive storm forces.
• Restoration – Allows resurrection of Veldora through stored data.

Velgrynd – Flame and Acceleration

• Scorch Dragon Summon – Access to Velgrynd’s power.
• Heat Manipulation – Extreme thermal energy control.
• Speed Amplification – Acceleration-based combat dominance.

These abilities highlight a key TenSura theme: power derived from connection rather than domination.

Void God Azathoth – The Pinnacle of Existence

Azathoth represents the culmination of Rimuru’s evolution. It is not just a skill but a system that controls fundamental aspects of reality.

Core Capabilities

Azathoth feels like the moment Rimuru transcends character progression entirely and becomes a governing force of reality itself.

Shub-Niggurath – The System of Creation

While Azathoth represents destruction and control, Shub-Niggurath is responsible for creation, distribution, and management of abilities. It is essentially the administrative system behind Rimuru’s godlike evolution.

Main Functions

• Skill Creation – Generates new abilities from analyzed data.
• Skill Duplication – Copies abilities from other beings.
• Skill Gifting – Grants powers to allies and subordinates.
• Skill Bank – Stores all previously encountered skills.

This system is often overlooked, but it is what allows Rimuru’s nation and allies to scale alongside him.

Final Thoughts: The Slime Who Became a System

Rimuru’s evolution is not just about power scaling. It is about transformation into something closer to a structured system governing reality itself. Instead of becoming a traditional “strong character,” he becomes an interconnected framework of intelligence, space manipulation, energy control, and conceptual authority.

What makes this so compelling is that despite reaching near-godlike levels, Rimuru still retains a grounded personality. That contrast between casual behavior and absolute power is what keeps his character engaging.

In the end, Rimuru Tempest is not just overpowered. He is what happens when a character stops growing within rules and starts rewriting them entirely.