The Karkata is a weapon in Final Fantasy XII. It is the upgraded Blood Sword added to the Zodiac versions. It is obtained from the bazaar Crimson Blade set and by stealing from Flowering Cactoid in Trial Mode Stage 3 (rare).
Instead of Sap, the Karkata inflicts Confuse to all those it strikes who are not immune.
It can be equipped by the Knight, and its license is far away from the Blood Sword license. For the Bushi, the Zalera Esper license must be obtained, then the Blood Sword, then the Karkata.