The short version
30-second read- Tasks pay no Slayer points by default. Only the Slayer Point Mortifier pays: 5-15 on low tasks, 25-40 on basilisks, wyrms, kurask, aquanites and drakes.
- Every assignment has a superior variant. Superiors still need Bigger and Badder (50 points), so unlock it before chasing the imbued heart or eternal gem.
- Clear 50 of his tasks for three choices. The short low tasks are the quick way to reach 50 completions, after which he offers three options instead of two.
- Stay on Duradel or Nieve for points. Duradel pays 15 points per task before streak bonuses, so XP and point training belong there.
Mortimer Requirements and Location
Mortimer is the Slayer Master in Wyrmscraig Cavern, added with Wyrmscraig on 29 July 2026, and he is now the highest-level master in the game. He gives tasks if you have 100 Combat and 70 Slayer, or any Combat level with 99 Slayer and the Slayer cape shown to him. You also have to reach him during Fallen From Grace, which needs 62 Sailing, 60 Crafting, 53 Mining, 47 Runecraft and Pandemonium to start.
Three things make him different. He only assigns monsters that have a superior variant. He lets you pick from two tasks, or three once you have done 50 of his. And his tasks pay no Slayer points unless the one you pick rolls the points Mortifier.
| Detail | Value |
|---|---|
| Location | Wyrmscraig Cavern, under the island of Wyrmscraig |
| Task requirement | 100 Combat and 70 Slayer, or 99 Slayer with the cape; partial completion of Fallen From Grace |
| Task choice | 2 options per assignment, 3 after 50 Mortimer tasks |
| Skip cost | 100 Slayer points (30 at every other master) |
| Block slots | 2, at 120 points each |
| Points per task | 0 by default; the Slayer Point Mortifier pays 5 to 40 depending on the task |
| Task list | 29 monsters, total weight 276 |
| Turael skip | Does not work on Mortimer tasks |
How to Unlock Mortimer
You meet Mortimer partway through Fallen From Grace. The quest sends you into Wyrmscraig Cavern on a raft or skiff (a sloop cannot fit through the cave), where a talking skeleton asks you to kill three level 69 mountain trolls blocking the path. Once the rocks are cleared he introduces himself and can assign tasks straight away. You do not have to finish the quest first.
To get back later, a Slayer ring teleports you into the cavern once the quest is complete. You can also take the cathedral stairs down after the quest, or sail into the cave again.
For the rest of the island, including the bank chest and the Mad Angel, see our Wyrmscraig guide.
Mortimer Task List (All 29 Tasks)
Every task Mortimer can assign is below, with the kill count, the extended count if you own that extension, weight and requirements. The last two columns are the ranges the Slayer Point and Superior Drop Rate Mortifiers can roll on that task. A weight-10 task is picked 25% more often than a weight-8 task.
| Task | Kills (extended) | Weight | Requirements | Points Mortifier | Superior boost |
|---|---|---|---|---|---|
| Crawling hands | 35–50 | 10 | 5 Slayer, Priest in Peril | 5–15 | 50–100% |
| Cave crawlers | 35–50 | 10 | 10 Slayer, 10 Combat | 5–15 | 50–100% |
| Banshees | 35–50 | 10 | 15 Slayer, 20 Combat, Priest in Peril | 5–15 | 50–100% |
| Rockslugs | 35–50 | 10 | 20 Slayer, 20 Combat | 5–15 | 50–100% |
| Cockatrice | 35–50 | 10 | 25 Slayer, 25 Combat, 20 Defence | 5–15 | 50–100% |
| Pyrefiends | 35–50 | 10 | 30 Slayer, 25 Combat | 5–15 | 50–100% |
| Basilisks | 40–60 (200–250) | 10 | 40 Slayer, 40 Combat, 20 Defence | 25–40 | 200–300% |
| Infernal mages | 35–50 | 10 | 45 Slayer, 40 Combat, Priest in Peril | 5–15 | 50–100% |
| Bloodvelds | 120–180 (200–250) | 8 | 50 Slayer, 50 Combat, Priest in Peril | 10–15 | 100–150% |
| Gryphons | 80–120 (160–200) | 10 | 51 Slayer, 45 Sailing, Troubled Tortugans | 10–25 | 100–150% |
| Jellies | 80–120 | 10 | 52 Slayer, 57 Combat | 10–15 | 100–150% |
| Custodian stalkers | 80–120 (200–250) | 8 | 54 Slayer, Shadows of Custodia | 10–15 | 100–150% |
| Turoth | 80–120 | 10 | 55 Slayer, 60 Combat | 15–30 | 200–300% |
| Warped creatures | 80–120 | 10 | 56 Slayer, The Path of Glouphrie | 15–30 | 200–300% |
| Cave horrors | 80–120 (200–250) | 10 | 58 Slayer, 85 Combat, Cabin Fever | 15–30 | 200–300% |
| Aberrant spectres | 80–120 (200–250) | 10 | 60 Slayer, 65 Combat, Priest in Peril | 15–30 | 200–300% |
| Wyrms | 80–120 (200–250) | 10 | 62 Slayer | 25–40 | 200–300% |
| Dust devils | 120–180 (200–250) | 8 | 65 Slayer, 70 Combat, part of Desert Treasure I | 10–15 | 100–150% |
| Kurask | 40–60 | 10 | 70 Slayer, 65 Combat | 25–40 | 200–300% |
| Venators | 120–180 | 10 | 74 Slayer, 60 Combat, The Blood Moon Rises | 10–25 | 200–300% |
| Gargoyles | 120–180 (200–250) | 10 | 75 Slayer, 80 Combat, Priest in Peril | 15–30 | 200–300% |
| Aquanites | 40–60 (150–200) | 10 | 78 Slayer, 73 Sailing | 25–40 | 200–300% |
| Nechryael | 150–200 (200–250) | 8 | 80 Slayer, 85 Combat, Priest in Peril | 10–20 | 70–120% |
| Drakes | 40–60 | 10 | 84 Slayer | 25–40 | 75–150% |
| Abyssal demons | 120–180 (200–250) | 8 | 85 Slayer, 85 Combat, Priest in Peril or Fairytale II | 10–25 | 30–60% |
| Dark beasts | 40–60 (110–135) | 10 | 90 Slayer, 90 Combat, started Mourning's End Part II | 10–25 | 200–300% |
| Araxytes | 120–180 (200–250) | 8 | 92 Slayer, Priest in Peril | 10–20 | 10–25% |
| Smoke devils | 80–120 | 8 | 93 Slayer, 85 Combat | 10–20 | 10–25% |
| Hydras | 150–200 | 10 | 95 Slayer | 15–30 | 75–150% |
He ignores master-specific unlocks, so he can give you gryphons, aquanites or basilisks even if you never bought their Slayer Reward unlocks. Extensions still apply. He is the only master who assigns venators directly, and he shares hydras with Konar, infernal mages with Vannaka and rockslugs with Mazchna, which used to be single-master tasks.
Where a task has a boss you can kill the boss on task, but superiors only spawn from the regular monsters. If you are on Mortimer for superior drops, do the task on the normal version.
Mortimer Block List
Mortimer has his own block list with two slots, and each block costs 120 points. It is separate from your Duradel or Nieve list. A skip costs 100 points and Turael cannot replace his tasks, so blocks and the task choice are your only filters.
Because you already choose from two or three tasks, a block only saves you when every option offered is one you would refuse. Put the two slots on weight-10 tasks you turn down every time, since those come up most.
Blocks for an imbued heart or eternal gem hunt
Unique odds from a superior scale with the monster's Slayer requirement. The wiki formula puts the imbued heart at 1 in 8 × (200 − (Slayer req + 55)² ÷ 125) per superior before any Mortifier, and the eternal gem has the same odds. That is about 1/1,370 for a crawling hand superior and 1/160 for a hydra superior.
The seven low-level weight-10 tasks (crawling hands, cave crawlers, banshees, rockslugs, cockatrice, pyrefiends and infernal mages) are the natural blocks for that goal. They also carry the smallest superior boost of the weight-10 tasks at 50–100%, against 200–300% on turoth, gargoyles, wyrms or dark beasts. Two slots cannot cover all seven, so block the two you like least.
Wait until you have 50 Mortimer tasks done. Those low tasks are only 35–50 kills, which makes them the quickest way through the 15, 25, 40 and 50 completion thresholds that unlock the other Mortifiers and the third choice.
Tasks to keep
Hydras have the best unique odds on his list and a 75–150% superior boost. Dark beasts are only 40–60 kills with a 200–300% boost and about 1/254 heart odds per superior.
Mortifiers: Every Modifier and When It Unlocks
Mortifiers are the modifiers attached to his offered tasks. One or more of the options will carry one, and they unlock by the number of Mortimer tasks you complete. Values move in 5% steps.
| Tasks done | Mortifier | What it does |
|---|---|---|
| 0 | Slayer Point | Pays points on completion: 5–15 on the low tasks, up to 25–40 on basilisks, wyrms, kurask, aquanites and drakes |
| 0 | Task Quantity | Changes the kill count. Low tasks roll −15 to +30 kills; higher tasks gain 30 to 150. Abyssal demons at 200–250 with +75 become 275–325 |
| 15 | Clue Scroll | Higher clue drop rate: 75–150% on most tasks, 35–75% on six of them, and none on crawling hands, cave crawlers, rockslugs, infernal mages, custodian stalkers and dust devils |
| 25 | Superior Drop Rate | Superiors roll the superior unique table more often, from 10–25% up to 200–300% depending on the task |
| 40 | Slayer XP | More Slayer XP from the monster and its superior, from 5–15% up to 25–100% |
| 50 | Third Task Choice | A third option on every assignment |
Jagex roughly halved these thresholds in its 27 July 2026 post after player feedback. The first proposal needed 100 tasks for the third choice.
Your enchanted gem or Slayer ring shows which Mortifier the current task has, but only a Slayer Master tells you the exact percentage, and the gem loses it if you log out. If the Slayer cape effect triggers on a Mortimer task, you keep both the task and its modifier, so a hydra task with a 150% superior boost can run a second time.
Who Should Use Mortimer
- Accounts chasing the imbued heart, eternal gem, or mist and dust battlestaves. Every Mortimer task has a superior, though superiors still need the Bigger and Badder unlock (50 points).
- Players who want to pick their task. His streak is counted separately from your normal one.
- 99 Slayer accounts under 100 Combat, who can use him by showing the cape.
Players training for XP and points should stay on Duradel or Nieve. Mortimer pays no points by default and his low tasks give 5–15 at best, while Duradel pays 15 for every task before streak bonuses.
Getting the Levels
If 70 Slayer or 100 Combat is what stands between you and Mortimer, our Slayer training is done by hand to the level you need.
FAQ
Where is Mortimer in OSRS?
In Wyrmscraig Cavern, under Wyrmscraig. After Fallen From Grace, the Slayer ring teleport puts you in the cavern.
Does Mortimer give Slayer points?
Only when the task you pick has the Slayer Point Mortifier. It pays 5–15 on the low tasks and 25–40 on basilisks, wyrms, kurask, aquanites and drakes.
Can you Turael skip Mortimer tasks?
No. Turael cannot replace his tasks. You can pay 100 points to skip, or block up to two tasks at 120 points each.
Does Mortimer share a block list with Duradel?
No. Mortimer has his own two-slot list, separate from Duradel's. Only Turael, Aya and Spria share a list.
Do Mortimer tasks count toward my streak?
They count toward a separate Mortimer streak. While he has a task choice waiting, other masters will not assign you anything until you go back and pick one.
Still stuck on a mechanic? Ask the team on our Discord, it is free.
Bottom Line
Mortimer is a superior-hunting master. Get 100 Combat and 70 Slayer, reach him in Fallen From Grace, use the short low tasks to clear 50 completions, then spend your two blocks on low-level tasks and take the tasks with 200–300% superior boosts when they are offered.
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