FFXIDB Tracking Data
151,713,533 Kills
680,586 Voidwatch Chests
84,094 Monster Spawns
7,267,914 Synthesis Results
As of the 19 February 2015 update.
271 Zones
8,887 NPCs
25,601 Items

Gneiss Leech BGW Wikia

Zone: Abyssea - Konschtat

Item Count Average TH0 TH1 TH2 TH3+
Item 2903Vial of eft blood 23504 out of 327087 7.2% 3.5% 8.0% 11.5% 12.9%
Item 924Vial of fiend blood 86817 out of 327087 26.5% 20.1% 21.7% 39.6% 49.8%
NPC Zone Spawns
No other NPCs with that name.

Spawns (12 total)

vial of eft blood
Vial of eft blood
Blood from an eft, said to be so vile that even leeches steer clear of it.
vial of fiend blood
Vial of fiend blood
This blood appears to have
come from a monstrous fiend.