Storm Flag transforms the Keyblade into a tattered, red flag bearing a steering wheel emblem. The flag is tied to a dark grey pole with a sharp point.
In Kingdom Hearts III, Storm Flag is the second Formchange of the Wheel of Fate Keyblade, associated with Strike Form and following Highwind. The combo consists of Sora telekinetically waving the flag around himself and slashing with it, with the finisher being a spinning thrust forward. Storm Flag uses Proximity-style Magic.
The Finish command has Sora plant the flag into the ground and spawn a watery portal. Aquatic copies of the Kraken's tentacles emerge from the portal and slam the ground around him.
Learning Storm Flag
Kingdom Hearts III