Mortimer is a new advanced Slayer master in OSRS requiring 70 Slayer and 100 combat. He adds task modifiers to assignments, offers greater flexibility in task selection, and introduces progression incentives, but traditional methods like Turael skipping cannot reset his tasks.
Requirements to Access Mortimer
To access Mortimer, players need to meet several prerequisites:
prerequisites
- Slayer level of at least 70.
- Combat level of 100 or higher.
- A specific Sailing level to reach Mortimer's island.
Mechanics and Task Modifiers
Mortimer introduces a unique system of task selection and modifiers, adding more variability and player choice to Slayer tasks.
steps
- Mortimer offers two task options initially, with a guaranteed modifier on each task such as increased task quantity, superior creature chance, or clue scroll drop rate.
- Completing 100 tasks for Mortimer unlocks a third task option for enhanced flexibility.
- Task modifiers grow progressively stronger as more tasks are completed. For example:
- Complete 25 tasks to unlock clue scroll bonuses.
- Complete 50 tasks to unlock Slayer XP modifiers.
- Complete 75 tasks to unlock superior creature drop rate changes.
- Complete 100 tasks to unlock an additional task choice.
- Skipping tasks costs 100 Slayer points, and Mortimer assignments cannot be reset using Turael skipping.
- Players are limited to two block slots, which cost 120 Slayer points each.
Two tasks with modifiers and amounts are shown for selection. — Gnomonkey
Progressing with Mortimer
Unlocking Mortimer's full features requires completing milestones that gradually improve the available options and rewards.
steps
- Progression involves unlocking modifiers for Slayer points, task quantities, clue scroll rates, XP, and superior drop rates.
- Completing 100 tasks unlocks the third task choice, enabling greater control in selection.
- Prioritize faster tasks to reach milestones quickly, especially for the initial 25 to 100 tasks.
The gameplay screen presents modifiers and task completion unlocks for Mortimer, guiding progression incentives. — Gnomonkey
Optimal Use Cases for Mortimer
Mortimer is particularly suited for certain scenarios:
When to choose Mortimer as your Slayer master
Choose Mortimer when:
- You want expedited superior creature drops, such as imbued hearts, through consistent task options and modifiers.
- You are aiming to maximize task efficiency without relying on Turael skipping.
- You have broader Slayer goals beyond boss tasks.
Avoid Mortimer when:
- You need specific boss tasks or tasks with no superior creatures.
- You want the highest XP rates, as alternatives like Duradel may offer better XP per hour.
Limitations and Costs
Using Mortimer comes with trade-offs, which may impact certain playstyles.
Details about the skip and block costs associated with Mortimer are included in this screenshot. — Gnomonkey
Using Mortimer for Imbued Heart Farming
Mortimer offers a streamlined imbued heart farming experience compared to currently used methods.
comparison
Mortimer
- Focuses exclusively on superior creature tasks, offering faster access to imbued heart grinds via progression-linked modifiers.
- Estimated grind duration ranges from 65 to 80 hours to obtain imbued hearts after unlocking his third task choice.
Duradel and Turael Skipping
- Traditional meta involves Turael skipping and targeting tasks like Aberrant Spectres and Smoke Devils.
- Estimated grind duration ranges from 80 to 100 hours.
FAQ: Frequently Asked Questions
FAQ
What are the requirements to access Mortimer in OSRS?
Mortimer requires 70 Slayer, 100 combat level, and a specific Sailing level to reach his location.
How do task modifiers work for Mortimer?
Task modifiers add guaranteed bonuses like superior creature chances, increased task quantities, boosted Slayer XP, or higher clue scroll drop rates. They unlock progressively as more tasks are completed.
Can I reset Mortimer tasks with Turael skipping in Old School RuneScape?
No, Turael skipping cannot reset Mortimer's assignments.
Which Slayer tasks does Mortimer assign in OSRS?
Mortimer assigns tasks exclusively featuring superior creatures. Tasks without superior creatures, such as certain bosses, are not included.
Is Mortimer good for clue scroll farming?
Mortimer offers clue scroll modifiers, but their effectiveness depends on the task and clue type. Medium clue scroll farming may not be as optimal due to limited task options.
What is the fastest way to unlock Mortimer's third task choice?
Completing 100 tasks for Mortimer unlocks the third task choice. Prioritize fast completion tasks with modifiers that reduce task quantity to progress efficiently.
Frequently asked questions about Mortimer addressed in the game's FAQ section. — Gnomonkey
Sources
Screenshots on this page are frames from the videos below, used to illustrate the steps they describe. All rights remain with their creators.
- New Slayer Master MORTIMER: Is He Better? (OSRS) — Gnomonkey, July 24, 2026
Checked against:
- The Blood Moon Rises Tweaks & Fixes | July 8th — Mod Yume, 2026-07-08
- Old School RuneScape - News — Old School RuneScape
