Star Cluster

The Kingdom Key W, also known as The King's Keyblade (王様のキーブレード), is a combination of Mickey's other two Keychains, Star Seeker and Kingdom Key D, in Kingdom Hearts III.

Kingdom Hearts III
After Mickey's Kingdom Key D is damaged during a fight with a Demon Tower, Mickey and Riku go to the Mysterious Tower to receive upgrades. With the Kingdom Key W in hand, Mickey and Riku return to the Dark Margin to find Aqua, only to be ambushed by another Demon Tower. Mickey is captured and disarmed by the Demon Tower while Anti-Aqua emerges from the Tower and picks up the Kingdom Key W. Anti-Aqua briefly wields the Kingdom Key W against Riku and Sora. After Sora frees Aqua from the darkness, Mickey resumes usage of the Kingdom Key W, wielding it during the clash between the Guardians of Light and the Seekers of Darkness.

Design
The Kingdom Key W is modeled after the Kingdom Key D and, by extension, Sora's Kingdom Key. It features a gold handguard, and a blue blade patterned in the manner of a starry sky. The point where the shaft joins to the rainguard now has a diamond-patterned bell shape. At the four corners of the handguard are five-pointed star designs. The Keychain has golden links connecting to a golden Hidden Mickey.