Omnislash

Omnislash is a ability only availible to Cloud in Kingdom Hearts, Kingdom Hearts II ,and Kingdom Hearts Chain of Memories. Only Chain of Memories is the only game where Sora can use this ability.

Kingdom Hearts
Cloud uses this ability during tournament matches against Sora and friends. First he says the words farewell and grows a wing and flies across the field hitting random characters. He also uses this ability when fights Sephiroth in the Final Mix version.

Kingdom Hearts: Chain of Memories
Sora can use this ability when he summons Cloud by stacking three Cloud Summon cards. The ability makes the Cloud summon swoop down from the heavens, attacking enemies in a wide area. Some players consider this as the ultimate summon move.

Kingdom Hearts II
This version of Omnislash is set as his Omnislash Version 5 from the CGI movie Final Fantasy VII Advent Children, but was mistranslated as Warrior Spirit in the English version. Cloud says farewell as in the first game, but he circles the entire field attacking a series of times on Sora then finally lands on the floor causing a explosion and catches his sword in the attacks end. Cloud also uses this ability when he joins Sora as a guest at Hollow Bastion and in it's starting point at the end of the battle with Sephiroth.