Sailor Piece is a Roblox RPG where certain Mythical materials gatekeep your most powerful unlocks, and Infinity Essence is one of the most important. You need it to obtain the Strongest of Today fighting style and push through Ascension 7, making it a high-priority farm for any serious player. However, the drop rate is low, and there are loot eligibility rules that many players miss entirely. This guide covers confirmed details, so you do not waste a single Limitless Key.

What Is Infinity Essence Used For?

Before jumping into the farm, it helps to know exactly what Infinity Essence does. There are two confirmed uses:

Use 1: Unlocking the Strongest of Today Fighting Style
You need 1 Infinity Essence as part of the full item submission to the Strongest of Today Trainer NPC on Shinjuku Island. This fighting style is also a hard requirement before you can access the Infinity Domain Mastery quest.

Use 2: Ascension 7 Requirement
Ascension 7 requires 2 Infinity Essence alongside 2 Cursed Flesh as material submissions, on top of reaching Level 9,000, killing 1,000 NPCs, defeating 350 Bosses, dealing 75B damage, using abilities 1,000 times, and clearing both Rune Dungeons (Hard) and Shadow Dungeons (Hard) 10 times each. Completing it rewards +10% Money, +10% Gems, and +5% Luck.

The Loot Eligibility Rule Most Players Miss

Before getting into the farming steps, this is the most common reason players walk away from a boss kill with nothing.

You must deal at least 10% of the Strongest of Today boss’s HP in a single fight to qualify for any drops, including Infinity Essence. The boss has approximately 125 million HP that scales with difficulty. If you deal less than the 10% threshold, no loot registers for you regardless of whether the boss dies. This is particularly important in group fights where damage gets spread across multiple players. Always confirm you are actively dealing enough damage before counting on a drop.

How to Get a Limitless Key

To spawn the Strongest of Today boss, you first need a Limitless Key. There are two confirmed sources:

• Defeat the Limitless Sorcerer (Gojo) at Shibuya Station, which carries a 30% drop chance for a Limitless Key. Gojo respawns approximately every 7 minutes and 30 seconds, making Shibuya Station the most efficient farming spot for keys.
• Defeat Strong Sorcerer enemy mobs, which have a 0.6% drop chance for a Limitless Key.

Farming Gojo at Shibuya Station is the recommended method. Stock up on multiple Limitless Keys before heading to Shinjuku Island so you can farm the Strongest of Today boss in uninterrupted runs.

How to Farm Infinity Essence: Step by Step

Step 1: Travel to Shinjuku Island

Use any portal in the game, scroll to Shinjuku Island, and teleport there. Once you arrive, locate the Strongest Boss Summoner NPC.

Step 2: Spawn the Strongest of Today Boss

Interact with the Strongest Boss Summoner NPC and use 1 Limitless Key to spawn the Strongest of Today boss.

Step 3: Choose Your Difficulty

The boss is available across multiple difficulties. Higher difficulties slightly increase the drop rates for Infinity Essence and other items, but the boss also becomes significantly tougher. Most players start on Normal or Medium difficulty while building up their gear and team, then move to harder modes once their damage output is strong enough to consistently clear the boss.

Step 4: Deal at Least 10% of the Boss’s HP

This is non-negotiable. With approximately 125 million HP, you need to deal at least 12.5 million damage in the fight to qualify for any drops. In group farming sessions, coordinate with your team to ensure you individually meet this threshold.

Step 5: Repeat Until Infinity Essence Drops

With a drop rate of 0.65% to 0.9%, consistent farming is the only path forward. Having a stack of Limitless Keys ready before you start is essential for an efficient session.

Strongest of Today Boss Drop Table

While farming Infinity Essence, the Strongest of Today boss drops several other valuable items simultaneously. Here is every confirmed drop worth tracking:

Item	Rarity	Drop Rate
Infinity Essence	Mythical	0.65% to 0.9%
Blue Singularity	Legendary	2% to 3%
Reversal Pulse	Epic	15% to 25%
Six Eye	Legendary	6% to 8%
Strongest Sorcerer Title	Title	1% to 1.5% (Pity at 125 kills)
Malevolent Soul	Legendary	2% to 3%

The Strongest Sorcerer Title comes with a confirmed pity system that guarantees a drop at 125 kills if it has not appeared yet. Extended farming sessions therefore serve multiple progression goals at once.

How to Unlock the Strongest of Today Fighting Style

Once you have farmed all the required items, visit the Strongest of Today Trainer NPC on Shinjuku Island and submit the following:

Required Item	How to Get	Notes
1 Infinity Essence	0.65% to 0.9% drop from Strongest of Today boss	Submitted to NPC
9 Reversal Pulse	15% to 25% drop from Strongest of Today boss	Submitted to NPC
3 Blue Singularity	2% to 3% drop from Strongest of Today boss	Submitted to NPC
6 Six Eye	6% to 8% drop from Strongest of Today boss	Consumed on use
Strongest Sorcerer Title	1% to 1.5% drop (Pity at 125 kills)	Must be earned

Important: The 6 Six Eye items are consumed when you interact with the NPC, meaning they permanently disappear from your inventory. Make sure you have all items ready before initiating the unlock, as the Six Eye items are not returned if something goes wrong.

How to Complete the Infinity Domain Mastery Quest

After obtaining the Strongest of Today fighting style, the next milestone is the Infinity Domain Mastery quest, which rewards the powerful “F” move for the fighting style alongside a permanent 30% damage boost.

Finding the NPC

The Infinity Domain Mastery NPC is located on Shinjuku Island, inside the crooked building near the Quest NPC on the island.

Full Requirements

Required Item	How to Get
Strongest of Today fighting style	Must be unlocked and equipped
Infinity Trait	Obtained via Trait Reroll currency (Mythical rarity, approximately 0.25% chance)
3 Blue Singularity	2% to 3% drop from Strongest of Today boss
1 Infinity Domain Shard	Crafted at the Infinity Domain Shard NPC

How to Craft the Infinity Domain Shard

The Infinity Domain Shard NPC is located near the rock behind the same crooked building as the Infinity Domain Mastery NPC on Shinjuku Island. Submit the following to craft one shard:

Required Material	How to Get
6 Energy Shards	Dropped by Strong Sorcerer enemy mobs on Shinjuku Island
2 Cursed Flesh	0.65% to 0.9% drop from the Strongest in History boss on Shinjuku Island

Note: The Strongest in History boss is a separate boss from the Strongest of Today boss. You spawn it through the same Strongest Boss Summoner NPC using a Limitless Key, but it is a different fight entirely. Cursed Flesh does not drop from the Strongest of Today boss, so plan separate farming runs for it.

Ascension 7: Requirements and Rewards

For players chasing Ascension 7, here is the complete confirmed checklist:

Requirement	Detail
Level	Reach Level 9,000
NPC Kills	Kill 1,000 NPCs
Boss Kills	Defeat 350 Bosses
Damage Dealt	Deal 75 Billion damage
Ability Uses	Use abilities 1,000 times
Dungeon Clears	Clear Rune Dungeons (Hard) 10 times
Shadow Dungeon Clears	Clear Shadow Dungeons (Hard) 10 times
Materials	2 Infinity Essence + 2 Cursed Flesh

Rewards: +10% Money, +10% Gems, +5% Luck

Once you have everything ready, head to Sailor Island, enter the temple premises, look to your left, and interact with the Ascension Master NPC. Hold the E key and click the Ascend button if all requirements show green ticks.

Farming Tips for Infinity Essence

• Stock up on Limitless Keys before starting your farm. Farm Gojo at Shibuya Station first since his 30% drop rate and 7-minute 30-second respawn make him the fastest key source in the game.
• Always confirm your 10% damage threshold. In group sessions especially, actively track your damage output to make sure you qualify for loot on every kill.
• Boost your Luck stat before farming. Higher Luck improves all drop rates including Infinity Essence. Stacking items such as the Fortune Rune, Destiny Mark Title, and Kitsune Race gives you a meaningful edge during extended sessions.
• Farm harder difficulties once your build allows it. Higher difficulty modes offer slightly better drop rates for Infinity Essence, making the upgrade worth it once you can handle the increased boss HP.
• Team up for faster clears. Group farming speeds up kill times considerably, particularly on Hard and Extreme difficulties. Just make sure every player in the group individually meets the 10% HP damage threshold.
• Use the pity system strategically. Since the Strongest Sorcerer Title guarantees at 125 kills, plan your farming sessions to also collect Blue Singularity and Reversal Pulse simultaneously, since you need all of them for the fighting style unlock.
• Redeem active Sailor Piece codes before farming to grab free Beli and rerolls that support your overall build.

Key Takeaways

• Infinity Essence drops from the Strongest of Today boss on Shinjuku Island at 0.65% to 0.9%. You need a Limitless Key to spawn it.
• You must deal at least 10% of the boss’s approximately 125 million HP in a single fight to qualify for any drops. Missing this threshold means no loot, even if the boss dies.
• Limitless Sorcerer (Gojo) at Shibuya Station is the best Limitless Key farm, respawning every 7 minutes and 30 seconds with a 30% key drop rate.
• Unlocking the Strongest of Today fighting style requires 1 Infinity Essence, 9 Reversal Pulse, 3 Blue Singularity, the Strongest Sorcerer Title, and 6 Six Eye items that are permanently consumed.
• Cursed Flesh drops from the Strongest in History boss, not the Strongest of Today boss. It is required for both Ascension 7 and crafting the Infinity Domain Shard.
• The Infinity Domain Mastery quest rewards the “F” move and a permanent 30% damage boost. It requires the Infinity Trait, 3 Blue Singularity, and 1 crafted Infinity Domain Shard.
• Higher Luck improves drop rates for Infinity Essence. Stack Fortune Rune, Destiny Mark Title, and Kitsune Race for the best farming efficiency.