What does Mourner (boss) drop in OSRS? Every drop ranked per hour

The best monster in the game for

Item	Drop (rarity · quantity)	Avg/kill	Per hour	GP/hr
Key (Biohazard) Best source	Always · 1	1	514

Preferences

Set these once and every page uses them. They're saved on this device only.

Your RuneScape name

Kill times are worked out from your combat levels, and monsters above your Slayer level are greyed out. Levels come from the official hiscores.

Kill times are rough. We can't see your gear, so any single time may be off, but every monster is worked out the same way, so the ranking is still a fair comparison.

Display

Show GP per hour (live Grand Exchange prices, for items you can trade)

Achievement diaries

Tick the diaries you've completed. Some of them improve drop rates and quantities.

Easy Kourend & Kebos Diary Elite Western Provinces Diary Hard Morytania Diary Medium Falador Diary Medium Wilderness Diary