Killer Wail

The Killer Wail is a special weapon in Splatoon.

Splatoon
When activated, the Killer Wail projects a series of concentric circles in its intended path for a moment before firing massive sound waves in the user's Ink color shortly after. They splat any enemies they touch, ignoring buildings or other obstacles. While the Killer Wail does not spread any Ink of its own unless an opponent is splatted, it is useful for gaining or keeping control of the stage.

Use

 * Use the Killer Wail through walls to surprise unsuspecting enemies that pass by.
 * If you run by a corner, hide there and activate the Killer Wail and watch the enemy run into it and splat themselves.
 * It requires approximately 2 seconds to channel and activate the Killer Wail. Make sure you activate it early to get the hit.
 * Though the main charm is to splat people, the Killer Wail is also excellent for chasing away enemies. Aim it at popular pathways, common sniping spots, splat zones, tower routes, etc. and you can essentially lock out enemies from these areas.
 * The Killer Wail is excellent against the Kraken or Bubbler because of its huge knockback. For instance, teammates sharing a Bubbler on top of the tower in Tower Control can all be pushed off with a well-aimed Killer Wail.
 * The Killer Wail is excellent to use at corridors where the enemy have hard time to move aside. It is very strong at stages like Walleye Warehouse, Port Mackerel and Camp Triggerfish.
 * It leaves a set of lines when it is about to activate. Watch out for them when they are visible and dodge it using Squid Form.
 * If an enemy has the Killer Wail as their special, take caution when walking around corners as they may silently channel it as a surprise.
 * It makes a loud guitar noise. This allows the player to know that someone is preparing a Killer Wail ambush. Use the noise to dodge it before retaliating.
 * Repeating the final boss level can help practice dodging the Killer Wail as one of his attacks uses the Killer Wail.

Splatoon 2
In Splatoon 2, as explained in Sunken Scroll 11, no Special Weapon from the first game returns. The role of the Killer Wail was indirectly replaced by the Sting Ray, in that they both shoot an extremely long beam that can pass through walls.

Octo Expansion
However during the final boss battle in the Octo Expansion, after the player has succesfully completed the objective, Pearl uses a Killer Wail together with her battle cry to defeat the final boss. Here the Killer Wail looks like it produces a torrent of ink instead of the sound waves. This Killer Wail has Off the Hook's Splatfest logo on it off to the sides, a triangle neon warning sign, and a big crown, matching the one Pearl wears during Octo Expansion.

Trivia

 * Killer Wail is a pun on Killer Whale.
 * When launched, the Killer Wail actually emits a guitar wail that lasts for a few seconds.
 * The Killer Wail most likely causes enemy Inklings to disintegrate, as they are supposedly made of liquid.
 * A Killer Wail is used by the final boss of Octo Valley in the second phase and later.
 * There are no Sloshers with the Killer Wail as their special weapon.

Super Smash Bros. Ultimate
The Inkling character in this game uses the Killer Wail in their Final Smash.