OSRS Fortis Colosseum Guide: 12 Waves, Modifiers and Gear

Overview

The Fortis Colosseum is a solo wave challenge on the cliffs east of Civitas illa Fortis in Varlamore. You fight eleven waves of regular enemies, then Sol Heredit on wave 12, and the only requirement is Children of the Sun. Before every wave, wave 1 included, Minimus offers three random modifiers. You must take one, and it stays active for the rest of the run. Beating Sol Heredit guarantees Dizana's quiver.

Two things set it apart from the Fight Caves and the Inferno. Every wave adds loot to a chest you can claim by ending the run between waves, so you can bank a partial run instead of risking it. And the modifiers stack: by Sol Heredit you have made twelve picks, each one either a new modifier or a higher tier of one you already have, so the order you take them in shapes the whole run.

The sections below go through access, the full wave list, how modifiers work, gear and supplies, Sol Heredit's mechanics, and what you need for Dizana's quiver. If the quiver is all you are after and you do not want to learn the waves, a Dizana's Quiver service is the other way to get it.

Requirements and Access

The Colosseum's only hard gate is Children of the Sun, the quest that opens Varlamore. There is no combat or Slayer level requirement and no entry fee. Everything else in the table is what the wiki recommends for a first quiver, and it is a high bar.

There is no easy mode. You cannot decline the modifier offer, so the best you can do is take the least harmful of the three each time and end the run through Minimus when your supplies tell you to.

Getting There

The Colosseum stands on the cliffs east of Civitas illa Fortis, the main city of Varlamore.

1. 1

   Complete Children of the Sun.

2. 2

   Take the quetzal to the Fortis Colosseum stop and walk east, or cast Civitas illa Fortis Teleport (54 Magic and Twilight's Promise) and walk south-east. At 12,000 Glory a ring of dueling teleports you straight there.

3. 3

   In the lobby under the arena, speak to Minimus.

   He offers three modifiers before wave 1, always Relentless, Blasphemy and Frailty, and the wave starts once you pick one.

Set up before you talk to him: inventory, prayers and the tile you want to start from. Teleporting or logging out during a wave forfeits all loot. The clean exit is ending the run through Minimus between waves, which also restores your stats.

Recommended Stats

These are the wiki's suggested minimums for a first completion. Nothing enforces them, but every Colosseum enemy is accurate, and higher stats mostly buy you time on bad double-south spawns before reinforcements land.

Gear Setups: Budget, Mid and Best in Slot

You need two kinds of damage. A strong ranged (or magic) setup clears the waves, and a slash melee weapon kills Sol Heredit, whose ranged and magic defences make bows close to useless on wave 12. The wiki calls a melee-only first quiver extremely difficult even with a scythe of vitur, because south spawns and pillar stacks need reach.

Sunfire fanatic armour from the Colosseum chest is a melee set, so the content partly gears you for later runs once you can clear the waves reliably.

Inventory and Supplies

Eleven waves and a long boss fight with no restock. The wiki gives no fixed brew and restore count because it depends on how much you flick, so measure your own usage per wave and adjust.

• Saradomin brews and super restores, which make up most of the inventory.
• A divine super combat potion for Sol and a divine ranging or bastion potion for the waves.
• Sanfew serums in case Mantimayhem II comes up, since it makes unprayed manticore hits envenom you.
• A Saradomin godsword: it one-shots the ranged Fremennik, and its special restores health and prayer after a rough wave start.
• Dragon claws or burning claws to finish enemies before reinforcements and to end Sol below 10 per cent.
• A rune pouch for Death Charge and thralls if you play on the Arceuus spellbook.

Special attack energy does not regenerate between waves, so spend specs where they save the most. You do not need an escape teleport. End the run through Minimus between waves to keep your loot and get your stats restored.

Colosseum Waves 1 to 12

Waves 1 to 11 all start with the Fremennik warband trio, a berserker, an archer and a seer, plus that wave's other enemies. If a wave is still going after 40 seconds, reinforcements arrive from the north or south gate, whichever is closer to you. The wiki notes that realistically only waves 1, 2 and 4 can be cleared before reinforcements spawn.

Waves 6, 8, 10 and 11 are the hardest regular waves because of how many enemies are on the floor at once. Learn the manticore early: it charges up and fires a melee, a ranged and a magic orb in quick succession, so you flick through all three. The minotaur has the highest single hit in the Colosseum (74) and heals wounded enemies to full when it is not in melee range of you, but it is easy to safespot behind a pillar unless Red Flag is active.

Mechanics You Have to Respect

The roster is wider than the warband. Alongside the Fremennik berserker, archer and seer you meet serpent shamans (magic), jaguar warriors (three slash hits on a five-tick cycle), javelin colossi (ranged, with every fifth attack a javelin that lands on your tile and ignores prayer), manticores, shockwave colossi (magic, max hit 56) and minotaurs. Sol Heredit on wave 12 is a separate fight where protection prayers do nothing against most of his attacks.

Modifier details have been changed several times since release, so check the OSRS Wiki Fortis Colosseum page before a serious attempt.

Run Plan: Waves 1 to 12

Your first goal is a clean run to the quiver. Every run carries twelve modifier picks by the end, so the plan is about which ones you take and when you stop.

1. 1

   Wave 1 always offers Relentless, Blasphemy and Frailty.

   All three are manageable at tier one, so take one and start.

2. 2

   Start every wave from the same tile next to your pillar.

   Most learners use the north-west pillar.

3. 3

   Kill the Fremennik warband first: melee, then mage, then ranger.

   If they are still alive 12 to 14 seconds into the wave, that is the habit to fix.

4. 4

   Deal with south spawns next, then reinforcements, then the pillar stack.

5. 5

   Walk back to your start tile as soon as the last enemy dies.

   After wave 1 you cannot move while the modifier menu is open.

6. 6

   Take low tiers of modifiers you can handle as early as possible, so later offers are more likely to be upgrades of those instead of Bees! or Red Flag.

7. 7

   Track supplies per wave.

   If wave 8 leaves you short, end the run through Minimus and keep the chest.

8. 8

   Restore fully before wave 12.

   Sol Heredit has 1,500 hitpoints and six phases.

9. 9

   On Sol, dodge his attacks by tile, pray only for the triple attack, answer each grapple by slot and move for every light beam.

A run you end early still pays out, and the wave where you stopped tells you what to practise next.

Solo Versus Team

The Colosseum is solo only, and nobody else can enter your instance.

The big difference from the Fight Caves and the Inferno is how a failed run pays. In the Colosseum you can end between waves and claim everything earned so far, while the other two only give tokkul if you fall short.

If you want a boss-only breakdown, the Sol Heredit guide goes through the final fight phase by phase.

Common Mistakes and What Actually Kills You

Most Colosseum deaths come from a handful of repeat mistakes.

• Wandering after the last kill, then getting locked out of position by the modifier menu.
• Leaving the Fremennik warband alive too long, so reinforcements arrive with the trio still up.
• Taking Bees!, Red Flag or Totemic early when a safer option was on offer.
• Bringing a ranged-only setup and reaching Sol Heredit with no slash weapon.
• Camping Protect from Melee against Sol's area attacks, which it does not reduce.
• Turning Protect from Melee on too early for the triple attack, so he disables it.
• Clicking the wrong slot, or no slot, when he grapples.
• Dying to Doom stacks or a Volatility explosion after Sol is already dead, which loses the chest and the quiver.
• Teleporting out mid-wave and forfeiting loot you could have kept by ending the run between waves.

Drops Worth Knowing

Each wave adds loot to the chest, and the quality rises in later waves. Before every wave you see the current loot and what the next wave adds, then choose to continue or end the run.

Combat Achievements

The Colosseum has 13 Combat Achievement tasks across the elite, master and grandmaster tiers. Sportsmanship (master) is just defeating Sol Heredit once. The harder ones target the modifier system and the boss: One-off asks you to complete wave 11 with Red Flag, Dynamic Duo or Doom II active, Reinforcements wants Sol dead with Bees II, Quartet and Solarflare II, and Perfect Footwork means no damage from his spear, shield, grapple or triple attack.

Get the quiver first. One-off and Reinforcements need exactly the modifiers you avoid on a learning run, so treat them as separate attempts.

Ironman Notes

Dizana's quiver is untradeable, so ironmen earn it the same way as everyone else. Sunfire fanatic armour also comes straight out of the chest, which gives an iron a melee upgrade without a boss grind.

Supplies are the constraint. Because you can end a run between waves and keep the chest, an iron can stop when brews run low instead of gambling a whole stockpile on the waves that remain.

Fit it into your wider plan with the Ironman equipment progression guide.

FAQ

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