OSRS Drop Calculator › Astral rune

Best way to farm Astral rune

All 6 monsters that drop Astral rune, ranked by realistic quantity per hour — not just drop rate. Change the seconds-per-kill for any monster to match your own speed. 1 other source isn’t ranked; see why below.

Drop data: Astral rune on the OSRS Wiki

Currently fastest method
Spiritual mage (Zaros)
1,103 / hr
Monster Drops (rarity · quantity) Avg/kill Sec/kill Kills/hr Qty/hr
Spiritual mage (Zaros)
Combat lvl 182 · Slayer 83
15/128 · 38–98
 7.97 26 138 1,103
Alchemical Hydra
Combat lvl 426 · Slayer 95
6/101 · 150–300 (2 rolls)
 26.73 149 24 646
Blood Reaver
Combat lvl 161–174
15/128 · 25
 2.93 26 138 406
Spiritual mage
Combat lvl 120–182 · Slayer 83
9/128 · 15
 1.05 26 138 146
Basilisk Knight
Combat lvl 204 · Slayer 60
6/52 · 15–35
 2.88 78 46 133
Skeleton (Tarn's Lair) (Low level)
Combat lvl 42–59
3/128 · 2
 0.047 12 300 14

Other sources (not ranked)

Basilisk Sentinel is a superior slayer monster: it only appears randomly (~1 in 200 kills) while you’re on a slayer task. So it’s not included in the ranking above.

Monster Drops (rarity · quantity) Avg/kill
Basilisk Sentinel
Combat lvl 358 · Slayer 60
6/52 · 15–35 (3 rolls)
 8.65
How this is calculated: items/hr = (3600 ÷ seconds per kill) × average items per kill. Each monster's drop lines are listed as the wiki shows them (rarity · quantity); the average adds them all up, each as rarity × average quantity × rolls — so a guaranteed drop plus a rarer bonus drop both count. Drop rates and quantities come from the OSRS Wiki's community-verified drop tables. Seconds-per-kill is an editable estimate based on each monster's hitpoints and defence — your real speed depends on your stats and gear, so adjust it and your edits are remembered on this device. Rates marked ~ are approximate on the wiki.

Something wrong on this page?

Drop rates come from the OSRS Wiki and kill times are estimates, so mistakes happen. Tell us what's off and it'll be looked at.