Maelstrom

Maelstrom (メイルストロム) is a technique that appears in Kingdom Hearts Re:Chain of Memories and Kingdom Hearts Unchained χ. It allows Riku to unleash a spinning attack with the Soul Eater that rushes the enemy, followed by an upward slash.

Mechanics
In Kingdom Hearts Re:Chain of Memories, Maelstrom is a Duel Sleight that is activated by winning a five-card duel against an enemy.

Kingdom Hearts Re:Chain of Memories

 * Riku learns Maelstrom after defeating Ansem in the B12F Exit Hall.