Infamy (ffxi)  

Infamy is a "currency" tied to the Monstrosity battle system. It is used to purchase Monster species, Monster sub-species, and Instincts from the NPC Teyrnon in the Feretory.

Infamy is accumulated while a player is gaining experience points as a monster, with each kill giving the player Infamy equal to 10% the amount of experience points gained.

Final Fantasy XI Wikibase™