Quistis' Weapons

Chain Whip
Needs: 2 M-Stone Piece, 1 Spider Web. The M-Stone pieces are all around. The Spider Web is from a Caterchipillar in most forested areas.

Slaying Tail
Needs: 2 Magic Stones, 1 Sharp Spike. The Magic Stones are from Bit Bugs, who are quite common, and the Sharp Spike is from this scorpion-looking monster in the stairways leading to the sewers in General Caraway's house in Deling City.

Red Scorpion
Needs: 2 Ochu Tentacles, 2 Dragon Skins. Ochu Tentacles are from Ochus, big old plants that are in the Roswall Forest near Timber. The Dragon Skins are from defeating higher-level Hedge Vipers in the Roswall Forests too.

Save the Queen
Needs: 2 Malboro Tentacles, 4 Sharp Spikes, 4 Energy Crystals. The Malboro Tentacles are from Malboros, big nasty plants near Estar or on Hell Island. See the Slaying Tail for Sharp Spikes, and the Energy Crystals are from that weird black monster standing on Estar's highways.