Dark Maelstrom

Dark Maelstrom (ダークメイルストロム) is a technique that appears in Kingdom Hearts Re:Chain of Memories. It allows Riku to unleash a powerful spinning attack with a pair of energy blades that rushes the enemy, followed by an powerful upward slash with the two swords combined.

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

Kingdom Hearts Re:Chain of Memories

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