On Drop Rate
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About On Drop Rate

On Drop Rate helps you check roughly how long you'd need to grind for an item, and whether you're actually dry right now, or just feeling like it.

We're passionate OSRS players, grinding since the game's 2013 release across multiple accounts and every seasonal game mode along the way.

This vibe-coded project is built and maintained by us.

Greetings from Team On Drop Rate.

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← All bosses
Shellbane Gryphon
Shellbane Gryphon
Kills per hour modifier
kills/hour

The Belle's folly (tarnished) takes about
1 hour and 20 minutes to obtain if you are exactly on droprate.

Expected kills
75
Expected kills on drop rate
Expected time to obtain
1h 20m
at 56 kills/hour (average)

The time to obtain Belle's folly (tarnished) at Shellbane Gryphon, if you are exactly on drop rate, will be 1 hour and 55 minutes with beginner gear, 1 hour and 20 minutes with average gear and 1 hour and 9 minutes in max gear. That is about 75 kills on average.

Customize your estimated kills per hour above to see your own time to be on drop rate.

Additional information

During this grind you will also be making roughly 577,837 gp in total loot — about 431,452 gp per hour at 56 kills per hour. The biggest earner over that stretch is Rune scimitar at about 141,445 gp.

Each kill has a 1.3333% chance at Belle's folly (tarnished). Half of all players get it within 52 kills, 172 kills covers 90%, and 344 kills covers 99% — so going past 75 kills without one is unlucky, but not unusual.

Loot values use live Grand Exchange prices and shift with the market.

Loot from 75 kills

Loading prices…
Item Quantity Price (ea) Total value
Total loot value—

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