Rainmaker

Rainmaker is a Ranked Battle mode in Splatoon that was announced in the Splatoon Direct on May 7, 2015 and will be added on August 14th at 7pm PT. Nintendo has revealed the mode will somehow use the weapon shown on the right, which appears to be a metallic tiger/fish with a nozzle in its mouth, known in Japan as a Shachihoko.

Recently, it was leaked how this mode will work.

Trivia

 * Rainmaker was first announced in the Splatoon Direct on May 7, 2015. However, its description was extremely vague and only a picture of the Rainmaker itself was released.
 * More details of Rainmaker were datamined on June 21st, 2015.
 * Images of Rainmaker being played on an unnamed stage were revealed in the July 24th Japanese Splatoon trailer detailing future updates.
 * The Rainmaker shoots ink tornadoes like an Inkzooka after being fully charged.