It's the... eye of the Hydra! It looks like it can be combined with a heart and a fang.
40000 gp
60000 gp
Name
Level
Quantity
Rarity
Members
Hydra
194
1
0.05553334221866809%
true
Alchemical Hydra
426
1
0.5524861878453038%
true
Colossal Hydra
334
1
0.05553334221866809%
true