Kakuzu after using the Wind Release: Open Destruction to cause a whirlwind in the center of the battlefield will then through the use of the Fire-element mask release a large Fireball into the whirlwind that will then create the fireball to spilt up into 4-6 smaller fireballs mixed with Wind release and sending them into 4-6 different directions in a equal pattern.
trivia
• The Four Fireball pattern takes a cross formation whilst the Six Fireball pattern takes a Star formation