Leyak

Leyak is a hostile transcorporeal entity designated IS-0091 in the GATE Compendium. It appears as a mass of flesh resembling a reddish, skull-like head with three eyes, black hair hanging from the scalp, a partial spine and ribs, white tendrils, and a large pair of lungs. It hovers rather than walking, and it is strongly associated with x-ray-spectrum electromagnetic fields.

Leyak focuses on a single target at a time and will generally remain oriented toward that player, even when not in direct line of sight, unless it is being observed. It moves only when the target is not watching it directly or is beyond a certain distance, and even slight obstruction can be enough to let it advance. It can open unlocked doors, and it can pass through player-placed deployables and doors even when they are closed or locked, but it cannot pass through walls. While active, it emits short sighing or moaning vocalizations.

The creature is repelled by X-Ray Towers, X-Ray Lamps, and their OX variants, which also cause it to drop Leyak Essence. Direct, unobstructed staring will also force it to de-manifest after roughly 10–30 seconds. Doors, fences, and unbreakable windows usually do not count as proper obstruction, but breakable windows do. If the target gets too close, Leyak attacks with a wheezing strike that ignores armor completely. If the player pulls away, it continues the chase even while being stared at, and x-ray devices are the only way to stop its movement in that state, though staring still makes it vanish.

Leyak cannot be damaged by conventional means and reappears every 7.5 in-game hours, or about 15 minutes of real time. Its appearance rate increases for players who consume Greyeb, Greyeb Chowder, or Cosmato Salad Wrap, eventually rising to once per in-game hour. The creature seems to remain focused on one victim for a long time before changing targets, and it switches targets if its current target enters a portal world or dies. Equipping the Sensory Companion or the Leyak Pest also offers strong protection, since the creature behaves as though it is always being observed, though it can still become aggressive if the player approaches it or rounds a corner. Kylie also provides indirect protection by commenting on its presence.

If Leyak appears while its target is asleep, a pixelated version of the creature manifests in the dream minigame and eventually catches up to the target, waking them. This dream version moves according to the distance between the dream and real-world creature.

Leyak can be contained in Containment Unit: 91 by luring it close and blasting it with an X-Ray Lamp or X-Ray Tower. When successful, it appears inside the unit, but the containment must be refueled with Greyeb to prevent escape. Two Greyeb fully fuel the unit, and each segment of the fuel display depletes once per day, allowing a full containment period of one in-game week. Leyak Essence will also occasionally drop from the chute.

The creature is based on the Balinese folklore entity of the same name. Its appearance and associated death message connect it to Rangda, the demon queen of Leyaks, and the compendium entry states that it was discovered in Indonesia by a GATE TransRecon team led by Dr. Lenora Riggs.