OSRS Drop Calculator › Sanfew serum(4)

Best way to farm Sanfew serum(4)

All 4 monsters that drop Sanfew serum(4), 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: Sanfew serum(4) on the OSRS Wiki

Currently fastest method
Vet'ion
38 / hr
Monster Drops (rarity · quantity) Avg/kill Sec/kill Kills/hr Qty/hr
Vet'ion
Combat lvl 454
5/126 · 20 noted
 0.794 75 48 38
Calvar'ion
Combat lvl 264
5/128 · 6 noted
 0.234 43 84 20
Kraken
Combat lvl 291 · Slayer 87
4/128 · 2
 0.062 32 112 7
Thermonuclear smoke devil
Combat lvl 301 · Slayer 93
3/107 · 2
 0.056 78 46 2.6
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.