OSRS Drop Calculator › Contract of Glyphic Attenuation

Best way to farm Contract of Glyphic Attenuation

All 4 monsters that drop Contract of Glyphic Attenuation, ranked by realistic quantity per hour — not just drop rate. Change the seconds-per-kill for any monster to match your own speed.

Drop data: Contract of Glyphic Attenuation on the OSRS Wiki

Currently fastest method
Yama (Contract)
6.3 / hr
Monster Drops (rarity · quantity) Avg/kill Sec/kill Kills/hr Qty/hr
Yama (Contract)
Combat lvl 1238
Always · 1
 1 573 6 6.3
Greater demon (Chasm of Fire)
Combat lvl 92
1/81 · 1
 0.012 22 164 2
Black demon (Chasm of Fire)
Combat lvl 172
1/53 · 1
 0.019 39 92 1.7
Lesser demon (Chasm of Fire)
Combat lvl 82
1/123 · 1
 1 per 123 kills 20 180 1.5
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.