OSRS Master Clue Rewards Calculator
Every master casket reward at live prices with the Mimic, 3rd Age, gilded and Bloodhound chances, and the caskets to every unique and the log.
What a master casket gives
The Mimic
| Bonus reward | Quantity | Chance | Value |
|---|
Watson's master clue
Your next caskets
Uniques, sets and your collection log
| Chance done | Caskets | From here |
|---|
Open a log to tick what you already have. Each item shows its chance a casket, the caskets it takes on average and your chance of it in the caskets you plan to open.
Casket count rewards
These come once, with the casket that reaches the count, and again with each casket after if you lose one you have not used.
| Reward | Casket | For you |
|---|
Chances a roll are exact. Master caskets give 5 to 7 rewards, 6 on average, each rolled on the whole table, so one casket can hold the same item twice. Chances a casket count each number of rolls as equally likely and carry a ~. Values are today's Grand Exchange instant-sell prices after the 2% tax. Untradeable rewards that can be alched count at High Level Alchemy less a nature rune; scroll cases, emotes and the Bloodhound are listed, not priced. Checked against the OSRS Wiki on 2 November 2026.
How a master casket is rolled
Opening a master reward casket gives 5 to 7 rewards. Each one is a separate roll on the casket's table, and every roll lands in one of the tables below with the chance shown, then on one item in it. A master casket also gives the Bloodhound pet 1 time in 1,000.
| Table | Items | Chance a roll |
|---|---|---|
| Master clue uniques | 47 | 1/25.97 |
| Mega-rare table | 48 | 1/851 |
| Weapons | 6 | 1/5.05 |
| Runes and ammunition | 5 | 1/6.06 |
| Food | 1 | 1/30.32 |
| Resources | 13 | 1/3.03 |
| Shared rewards | 53 | 1/4.26 |
The Mimic
Once you turn Mimic encounters on at the strange casket upstairs in Watson's house, 1 master casket in 15 turns into the Mimic when you open it. You fight it at the strange casket, and beating it gives the casket's own rewards plus one bonus roll: a 3rd Age piece, a ring of 3rd Age, or a stack of runes, herbs, wine or manta rays, and a mahogany plank. You get 6 attempts. Each attempt you fail takes a reward off the casket and a sixth of the most off the bonus stack, and the 3rd Age chance drops a little after the first try; failing them all loses the casket. Dying costs 90,000 to get your items back from the strange casket. If you have never had a Mimic, your 10th master casket is one, or the next one if you are past it. The first Mimic you beat also gives the Mimic scroll case, one more clue of every tier in your stack.
Clue scrolls, the ring of wealth and combat achievements
Nothing you wear or unlock changes what a casket gives: a ring of wealth does nothing while you solve or open a clue. The ring of wealth (i) in the Wilderness and the combat achievement tiers change how often clue scrolls drop, which the dry calculator works out monster by monster, and the boss gp per hour calculator adds each boss's clues at these caskets' worth. How many master clues you can hold at once, and the scroll cases that raise it, is on the scroll box calculator. Some master clue steps hand you a puzzle box, a sliding puzzle to finish before the next step, and the puzzle box solver gives the moves for every one of them.
Deadman Mode
On the permanent Deadman world every master clue unique comes twice as often, and an accumulation charm in your inventory triples clue drops. Deadman Mode has a Grand Exchange of its own with no tax, so values there are main game prices without the tax, marked with a ~.
The other clue tiers
Each tier has its own casket and its own calculator: beginner clue rewards, easy clue rewards, medium clue rewards, hard clue rewards and elite clue rewards.
A master clue's anagram steps can hand you a light box, and the light box solver gives the fewest button presses that light every lamp from what each button changes.
Update history
Every change to this calculator
- The casket's reward tables and the collection log now fold, each with a summary line, and the log has its own search box.
- Calculator added