The key to mastering the Sanctum of Infinity is understanding it's not a new run, but a continuation of a successful one; this is the core of our Realm of Ink infinite mode guide. You enter this endless challenge with the exact build you used to defeat the final boss, meaning your entire strategy must shift from short-term victory to long-term, exponential scaling. Success isn't about finding a new broken combo, but about pushing a finely-tuned engine to its absolute limit against ever-stronger hordes.
This mode is the true endgame, designed for farming vast quantities of Jade Ink and Fox Blood to supercharge your meta-progression. Forget simply clearing rooms—your new goals are survival, efficiency, and seeing how far your build can bend before it breaks. Every choice, from the Ink Gems you carry in to the first perk you pick in the Sanctum, must serve the goal of infinite scaling.
How Do You Unlock the Infinite Mode?
Accessing the Sanctum of Infinity is straightforward, but not immediately available. You must first prove your mastery over the base game.
To unlock the endless mode, you need to complete a full run and defeat the final boss. Once you've achieved victory and returned to the Fox Inn, the path will open. Find and speak to Miss Li, the Go player, within the inn. She will present you with an option to enter the Sanctum of Infinity, allowing you to re-live your victorious run against endless waves of enemies. This is also accessible via the Archive in your menu, where you can select a past successful run to take into the sanctum.
The Infinite Mindset: Shifting from Victory to Endurance
Your approach in a normal run is fundamentally different from the one required for the Sanctum. A standard run is a sprint to the finish line, where you can often get by with a hodgepodge of decent perks and raw damage. The Sanctum is a marathon on an ever-steepening incline. Enemies don't just get more health and damage; they fill the screen, layering attacks until there's barely room to breathe.
Key Strategic Shifts:
- From Burst to Scaling: A build that kills a boss in 10 seconds might falter when faced with 50 elite enemies at once. Prioritize effects that scale with enemy density and duration, like Damage-over-Time (DoT), chain reactions, and pet damage.
- Defense Becomes Mandatory: You can't dodge everything forever. As the waves progress, incoming damage becomes overwhelming. Damage reduction, shields, and reliable health recovery are no longer luxuries; they are the bedrock of a deep run. A build without sustain is a build with a hard ceiling.
- Resource Farming is the Goal: Remember why you're here. The primary reward is a massive influx of Fox Blood and Jade Ink for the Talent Stele and other unlocks back at the Fox Inn. Surviving one more wave could be worth more than an entire normal run in terms of permanent upgrades.
Realm of Ink in-game screenshot
Building for Infinity: The Unbreakable Run
A build that can survive the Sanctum is not assembled within it; it's chosen and refined during the preceding run. Your goal is to enter the infinite mode with a synergistic, scalable, and defensively sound foundation.
Your Foundation: The Talent Stele
Before you even begin a run you intend to take to the Sanctum, your priority should be the Talent Stele in the Fox Inn. This is the main meta-progression system, and it is fueled by the Fox Blood you collect. Every point invested here provides permanent stat increases to damage, health, and utility that apply to all future runs. Neglecting the Talent Stele is like trying to build a skyscraper on sand. Max out crucial nodes for damage, survivability, and economy first.
Core Principles of an Infinite Build
When selecting Ink Gems, Perks, and Elixirs during your run, keep these principles in mind:
- Synergy Over Rarity: A Legendary Ink Gem that doesn't fit your build is worse than a Common one that does. Look for Ink Gems that complement each other. For example, Curse Ink (Water) makes enemies take more damage, which is a perfect force-multiplier for a high-stack Venom Ink (Wood) or Burning Ink (Fire) build.
- Automate Your Offense: The less you have to actively aim and attack, the more you can focus on dodging the literal bullet hell of later waves. This is why Ink Pet builds and Dash-attack builds excel. Your companion, Momo, can evolve into a powerhouse that clears half the screen for you, while dash perks turn your primary defensive tool into a constant source of damage.
- Invest in Your Ink Pet: Momo is more than a sidekick; he's a scaling machine. The form your Ink Pet takes is determined by the elemental combination of your two Ink Gems. Furthermore, evolving him with two Epic-or-higher rarity gems unlocks a powerful special skill that can often solo entire encounters. Feeding Momo dumplings at the Fox Inn also provides permanent stat boosts.
Realm of Ink in-game screenshot
Top-Tier Builds for the Sanctum of Infinity
While countless combinations exist, a few archetypes are naturally suited for the extreme scaling of infinite mode. Here are three of the most effective strategies.
1. The Undying Poisoner
This build focuses on stacking massive amounts of Poison DoT, amplified by Curses. Poison ignores enemy health pools, ticking for consistent damage that scales with the number of stacks you can apply. It's a patient, methodical build that excels in long, drawn-out fights.
- Core Ink Gems: Venom Ink (Wood) + Curse Ink (Water).
- Key Perks: Look for anything that increases DoT damage, duration, or stack limits (
Toxic Arrow,Blood Sickle). Perks that spread effects or trigger on enemy death are invaluable for clearing dense waves. - How it Scales: Curse Ink creates a damage vulnerability on enemies, making each tick of poison hit harder. As you collect more perks, you can apply dozens of poison stacks to every enemy on screen with a single skill, letting the DoT do the work while you focus on survival.
Realm of Ink in-game screenshot
2. The Ink Pet Commander
This strategy turns your Ink Pet, Momo, into the star of the show. You focus less on your own damage and more on buffing your companion, who becomes an autonomous, high-damage turret that also draws enemy aggression.
- Core Ink Gems: Any two high-rarity (Epic+) gems to unlock the pet's special skill. Combining two gems of the same element creates a potent specialized pet (e.g., two Fire gems for a damage-focused pet).
- Key Perks:
Pellet Drum(Ink Pet Damage),Gilded Fan(Ink Pet Skill Cooldown), and any perks that trigger effects when your pet deals damage. - How it Scales: Pet damage scales with your own stats and its own dedicated perks. In the Sanctum, where the screen is packed, the pet's AoE attacks and constant damage output provide incredible value, allowing you to play defensively while it dismantles entire waves.
3. The Untouchable Dasher
For players who prefer a more active, high-octane playstyle, this build turns your dodge into your primary weapon. It offers unparalleled mobility and survivability by tying offense directly to your main defensive maneuver.
- Core Ink Gems: Flexible, but often includes a gem with a defensive or utility skill, like Shield Ink (Wood) or Flash Ink (Water), to provide an emergency button.
- Key Perks: This build is entirely perk-dependent. You need perks that add effects to your dash, such as firing projectiles, dealing damage in an area, or applying status effects. Stacking multiple of these turns every dodge into a multi-hit attack.
- How it Scales: The more enemies, the more you need to dash. The more you dash, the more damage you deal. This creates a perfect feedback loop for the chaos of infinite mode. You are constantly repositioning and damaging simultaneously, making you an incredibly difficult target to pin down.
Realm of Ink in-game screenshot
Frequently Asked Questions about Infinite Mode
How does enemy scaling work in the Sanctum?
Enemies in the Sanctum of Infinity don't just get more health and deal more damage. The composition of waves becomes more complex, featuring more elite and shielded enemies earlier. Bosses and mini-bosses will eventually spawn as regular enemies within the waves, creating extremely dangerous and chaotic encounters.
What is the best character form for infinite mode?
This depends heavily on your build. However, forms that offer inherent scaling or powerful utility are top choices. For example, Six provides a bonus to Critical Rate and Effect Trigger Chance, making them a natural fit for DoT or crit-based builds that rely on probability. A'kuan's bamboo point system can also be leveraged for massive heavy attack damage if you can manage the resource.
Should I take a Primordial Ink Gem?
Primordial Inks are incredibly powerful, unique gems that are specific to your character form. However, taking one means you can no longer equip two standard Ink Gems. This is a massive trade-off.
Take the Primordial Ink if: Its ability is a cornerstone of your build and more powerful than the synergy of your two current gems. Avoid the Primordial Ink if: Your build relies on the elemental combination of your two gems for a specific Ink Pet form, or if the passive effects of your two gems are more valuable than the single powerful skill of the Primordial.
My run feels too easy, does it get harder?
Yes, absolutely. Early waves of the Sanctum might feel like a victory lap, especially with a strong build. However, the difficulty curve is exponential. Players report that after a certain point, enemies become so numerous and powerful that even the most broken builds are put to the test. The challenge is not in the first few minutes, but in surviving the onslaught half an hour in.
The Final Word
The Sanctum of Infinity is the ultimate test of your build-crafting skills in Realm of Ink. It's a mode that rewards careful planning, a deep understanding of synergy, and the foresight to build for the 100th wave, not just the first. Go back to the Fox Inn, invest your Fox Blood wisely, and craft a run not just to win, but to endure. The greatest rewards are reserved for those who can stare into the endless ink and not falter.