Reign Piece Rimuru Update Guide – How to Get Rimuru, Mastery System, Trait & More!

The latest Reign Piece update has introduced a huge amount of new content for players to explore. The highlight of the update is the arrival of Rimuru, but that’s not all. Players can also experience a brand-new Mastery System, unlock a new Trait questline, obtain Clan Relics, and explore the newly added Destruction Island. If you’re wondering how to unlock Rimuru and take advantage of all the new features, here’s everything you need to know.

How to Reach Destruction Island

The first thing you’ll need to do is travel to the new Destruction Island. You can find this island located behind Shibuya Crossing. Once you arrive, you’ll find several important NPCs, including:

• Rimuru Seller NPC
• Milim Boss
• Mastery NPC
• Clan NPC
• Quest NPCs

Most of the update’s content starts from this location, so you’ll be spending plenty of time here.

How to Get Rimuru in Reign Piece

To unlock Rimuru, players must complete the new Slime Questline. Before you can summon the Rimuru Boss, you’ll need to finish several objectives.

Step 1: Defeat Escanor and Estarossa

Your first objective is simple. You must defeat:

• Escanor 5 times
• Estarossa 5 times

Once these requirements are complete, you can move on to the next task.

Step 2: Collect Slimes

After defeating the required bosses, you need to gather 5 Slimes located throughout the map. The Slimes can be found in various locations, so make sure to explore carefully until you’ve collected all five.

Step 3: Obtain Milim Fang

The Milim Boss drops the Milim Fang. This item is required to summon the Rimuru Boss. Because of this, you’ll likely need to farm Milim several times until the required drop appears.

Step 4: Summon and Defeat Rimuru

After completing the Slime Questline and obtaining the Milim Fang, you can summon the Rimuru Boss. Defeating Rimuru rewards the materials needed to unlock the new fighting style and other update-related items.

Rimuru Showcase Overview

Based on early testing, Rimuru appears to be one of the strongest additions to Reign Piece. Some highlights include:

• High damage output
• Smooth animations
• Impressive visual effects
• Unique cutscenes
• Strong boss-farming potential

The skills feature effects inspired by the anime and offer both flashy visuals and solid performance during combat. For players looking for a powerful end-game option, Rimuru is definitely worth farming.

New Ultimate Questline

The update also introduces a separate Ultimate Questline. Unlike the Slime Questline, this one focuses on defeating Rimuru repeatedly and collecting special drops. Completing the Ultimate Questline rewards progress toward the new Trait system. Because some materials come directly from the Rimuru Boss, players should expect a bit of grinding before completing the entire quest chain.

New Mastery System Explained

One of the biggest features introduced in this update is the Mastery System. Mastery acts as a progression system that rewards players with permanent buffs as they continue playing. To gain Mastery, you must:

• Defeat enemies
• Kill bosses
• Complete combat-related activities

As your Mastery level increases, you’ll unlock stronger bonuses and stat boosts. This gives players a new reason to continue farming even after obtaining powerful weapons and abilities.

How Mastery Caps Work

Mastery progression is not unlimited. Players will eventually hit level caps that prevent further progression. To continue leveling, you must speak with the Yamamoto NPC. The NPC offers special contracts that allow you to break through your current cap. For example:

• Mastery Level 25 Cap
• Complete Contract
• Unlock Higher Mastery Levels

Each cap requires its own contract, making Mastery a long-term progression system rather than something players can simply AFK grind.

Clan Relics and New Clans

Another addition in this update is Clan Relics. Clan Relics work similarly to rerolls and allow players to obtain different clans. Currently, many players consider the Slime Clan to be one of the strongest options available because of its powerful bonuses and synergy with the new update content. However, there are several clans worth testing depending on your build and preferred playstyle.

Quality of Life Improvements

The update also adds a useful Auto Haki feature. Players can enable Auto Haki through the settings menu, making combat smoother and reducing the need to manually activate Haki during farming sessions. While it may seem like a small addition, it significantly improves the overall gameplay experience.

Is the Rimuru Update Worth Playing?

The Rimuru Update is one of the largest Reign Piece updates so far. Besides introducing a powerful new character, it also adds meaningful end-game progression through the Mastery System. The addition of Destruction Island, new quests, Clan Relics, and quality-of-life improvements gives players plenty of reasons to return. For new and veteran players alike, the Mastery System is arguably the most important feature since it creates long-term goals beyond simply collecting weapons and abilities.

The Reign Piece Rimuru Update brings a lot more than just a new boss and fighting style. Players can unlock Rimuru through the Slime Questline, challenge the Ultimate Questline for new rewards, progress through the Mastery System, and experiment with new clan options. With fresh end-game content and a completely new progression mechanic, this update adds plenty of depth for players looking to continue their adventure in Reign Piece.