Tempest

Tempest (天平寿都) Is the only Noble Phantasm of Shu Kurogane and is his most consistent method of fighting. His Noble Phantasm begins by forming near Tornado level winds, able to rip through most defenses with ease. Following this, Shu is able to add Elements into his wind, including Flames, Ice/Hail, Sand, or even Lightning and trap his opponents inside the storm and brutalize them if not kill them.

Weakness
Though not an easily exploitable weakness, his ability must always start as his Wind, if he's facing someone who can cut off or power through his wind, he'd be unable to progress to the later stages of his Noble Phantasm, forcing him to respond with his blade.