Dropped by
Configured rates, and the rate after the server’s drop multipliers
Rybio 
Harpy Observed drop rates per monster are on each monster’s page.
Used in
Recipes that take Izidor as a material or guide · all recipes
Cooked Nine Tail's Tails Cooking · A cooking kit · Food level 10
Nine Tails × 10
Four Leaf Clover × 2
Maneater Root × 10
Sharp Leaf × 10
Yggdrasil Leaf × 4
Savory Sauce × 1
Yellow Spice × 1
Izidor × 2 
Level 10 Cookbook held
Sold by
NPC shops
No NPC sells this item