OSRS Leagues 6 Best Tier 6 Relics Guide
Tier 6 relics in OSRS Demonic Pacts (Leagues 6) are where builds fully open up and start defining how you handle combat, sustain, and late game content. At this point, your relic choice is less about small boosts and more about unlocking entire systems that were previously restricted.
Best Tier 6 Relic In OSRS Leagues 6
The best Tier 6 relic in OSRS Leagues 6 is Grimoire because it unlocks all spellbooks and prayers with free swapping, giving unmatched flexibility and power across every combat style.
The moment you pick Grimoire, your account stops being limited by quests, regions, or progression requirements. You instantly gain access to everything, and you can switch between spellbooks whenever you want.
What you notice right away is how much more adaptable your build becomes. You are no longer locked into one setup, you are adjusting on the fly depending on what you are doing.
Why Grimoire Is So Strong
Grimoire is powerful because it removes restrictions that normally define builds.
You are getting:
Full access to all spellbooks
All prayers unlocked instantly
Free swapping between spellbooks at any time
This changes how you approach combat entirely. You can use Ancient Magicks for burst, swap to Lunar spells for utility, then switch again depending on the situation.
It also removes the need to plan around unlocks. You already have everything available, which simplifies your entire progression path.
What You Actually Notice In Gameplay
The biggest difference is how flexible everything feels.
You:
Switch spellbooks instantly for different situations
Use any prayer setup without restriction
Adapt your build depending on the content
Instead of committing to one route, you respond to what you are doing in real time.
This becomes especially noticeable during bossing, where different encounters benefit from different spellbooks and prayers.
Why This Relic Defines Your Build
Unlike earlier tiers, this one is not just about efficiency, it is about access.
Grimoire lets you:
Combine Magic, Melee, and Ranged setups more easily
Use utility spells without sacrificing combat options
Adjust your playstyle without rebuilding your Pact path
It works especially well with hybrid builds, where flexibility is more valuable than raw numbers.
When Eternal Sustenance Is Worth Taking
Eternal Sustenance removes food consumption entirely.
It gives:
Infinite food usage without consuming supplies
Constant sustain during combat
This can feel extremely strong in long fights or difficult content, since you no longer worry about running out of food.
What you notice is how forgiving combat becomes. Mistakes are less punishing, and sustain becomes constant.
The tradeoff is that it only affects survivability, not progression speed or flexibility.
Where Culling Spree Fits
Culling Spree is focused entirely on Slayer and bossing efficiency.
It provides:
Choice between Slayer tasks
Increased superior spawn chains
Free Slayer perks and gear unlocks
This relic can generate huge amounts of drops and clue scrolls, especially if you commit heavily to Slayer.
You will notice faster task completion and more frequent rewards, but it requires staying within Slayer focused gameplay to fully benefit.
Quick Tier 6 Relic Breakdown
Grimoire
best overall, full access to all spells and prayers
Eternal Sustenance
best for infinite sustain in combat
Culling Spree
best for Slayer focused progression and rewards
How Tier 6 Relics Affect Late Game
This is where your build either becomes flexible or specialized.
With Grimoire, you notice:
Total freedom in spell and prayer usage
Easier adaptation to different content
Strong synergy with hybrid builds
With Eternal Sustenance:
Constant survivability
Less pressure in long fights
Minimal resource management
With Culling Spree:
Faster Slayer progression
More rewards and clue drops
Strong focus on task based gameplay
This tier shapes how you approach the rest of your run. Also, you can see our full tier list/rankings of all relics here for Leagues 6
Final Blurb
Grimoire is one of those relics that makes everything feel easier to manage without forcing you into a specific playstyle. You just have access to everything, and that freedom shows up constantly as you play.
Instead of working around limitations, you are choosing what works best in the moment and moving on.
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