Stealth

Stealth is the mechanic by which some units become invisible for a determined period of time. Stealth is divided into three categories: Camouflage (also known as Strategic stealth), Invisibility (also known as Tactical stealth) and Stealthed traps.

Camouflage

EditCamouflage is a form of stealth that renders a unit hidden from enemy

vision for a long period of time. It is usually activated preemptively in order to ambush an enemy or to bypass the surveillance of hostile

wards patrolling an area. It also grants

ghosting.

Camouflaged units are revealed while being inside the line of sight (e.g. not in the fog of war, behind terrain, or blocked by nearsight) of a nearby enemy champion (with the range depending on the ability), when within the vision radius of an enemy Control Ward (900 units), or from sources of True Sight.
Stealthed units shimmer their character model for 0.6 seconds whenever they take damage.
- A unit will shimmer for every instance of damage they take, and shimmering does not make the unit targetable nor remove the stealth effect, but grants positional information to the enemy.
When a camouflaged unit can be seen, they will be warned by an exclamation mark above them indicating they have been spotted.

Champions

Evelynn's Demon Shade, starting from level 6, allows her to permanently enter camouflage after being out-of-combat for 4 seconds.
Rengar's Thrill of the Hunt enters camouflage for up to 12 / 16 / 20 seconds, gaining 40% bonus movement speed. Attacking or casting most spells breaks camouflage.
Twitch's Ambush enters camouflage after 1 second for 10 / 11 / 12 / 13 / 14 seconds, gaining 10% bonus movement speed, increased to 30% while moving towards nearby enemy champions who cannot see him. Attacking or casting spells breaks camouflage.

Invisibility

EditInvisibility is a form of stealth that renders a unit hidden from enemy

vision for a short period of time. It can be utilized to sneak in on opponents as well as the ability to reposition in-combat or simply to flee from a skirmish. It also grants

ghosting.

Invisible units can only be revealed by True Sight.
Stealthed units shimmer their character model for 0.6 seconds whenever they take damage.
- A unit will shimmer for every instance of damage they take, and shimmering does not make the unit targetable nor remove the stealth effect, but grants positional information to the enemy.

Champions

Akali's Twilight Shroud, while inside the smoke cover, Akali immediately gains invisibility and 20 / 40 / 60 / 80 / 100% bonus movement speed. If Akali uses a basic attack or ability inside her smoke cover, she will reveal herself for 0.65 seconds.
Kai'Sa's Supercharge enters invisibility for 0.5 seconds while charging.
Kha'Zix's Void Assault enters invisibility for 1.5 seconds, gaining 40% bonus movement speed and ignoring unit collision for the duration. After 2 seconds of leaving stealth, and for the next 10 seconds, Void Assault can be cast a second time at no cost.
- Kha'Zix's Evolved Void Assault, while out of combat, Kha'Zix passively gains Void Assault for 3 seconds in brush. This persists for up to 1.5 seconds after exiting the brush (10 second per brush cooldown).
Shaco's Deceive enters invisibility after 0.125 seconds for 1.5 / 2.25 / 3 / 3.75 / 4.5 seconds. Shaco remains invisible even while casting Hallucinate. Casting Jack in the Box briefly reveals Shaco's position, but doesn't make him targetable.
Talon's Shadow Assault enters invisibility for up to 2.5 seconds, gaining 40 / 55 / 70% bonus movement speed. Basic attacking or casting an ability breaks invisibility.
Teemo's Guerrilla Warfare enters invisibility if he stands still for 1.5 seconds without acting or being acted upon. He will remain stealthed so long as he doesn't move, doesn't act, or is displaced. If within a brush brush, Teemo gains stealth after 0.75 seconds even while moving and may move freely within its boundaries without breaking stealth.
Vayne's Final Hour, while active, empowers Tumble to turn Vayne invisible for 1 second on cast. Basic attacking or casting an ability breaks invisibility.
Wukong's Decoy enters invisibility for 1.5 seconds. Basic attacking or casting an ability breaks invisibility.

Stealthed traps

EditStealthed traps are units that are hidden from enemy

vision for a set duration until triggered by an enemy. They can only be revealed by

True Sight,

Control Wards,

Oracle Lens, and

A Harmless Scarecrow.

Champions

Shaco's Jack in the Box summons a box at the target location, which stealths after 2 seconds, lasting up to 60 (+ 5% AP) seconds
Jhin's Captive Audience places a Lotus Trap at the target location that lasts for 2 minutes. The Lotus Trap blooms if an enemy walks over it, revealing all enemies caught inside for 4 seconds.
Nidalee's Bushwhack lays a trap at the target location, which stealths and arms after a brief delay and lasting for up to 2 minutes. The next enemy who springs the trap takes magic damage over 4 seconds granting True Sight for the duration.
Teemo's Noxious Trap tosses a mushroom trap on the ground, which stealths and arms after 1 second, lasting up to 5 minutes. While armed, mushrooms grant sight in a 212.5-range radius.

Items

Stealth Wards or Totem Wards from:

Vanish

EditIn addition to granting

untargetability, vanish briefly hides a unit from the game's renderer, which causes it to become completely undetectable and invisible even to effects such as

Oracle Lens. Vanished units are

unable to act. As with all untargetability,

tethers will still persist on a target that vanishes.

Vanish is not considered stealth and does not interact with sight effects.

Champions

LeBlanc's Mimic vanishes for 0.1 seconds upon casting an empowered basic ability.
Rek'Sai's Void Rush vanishes for 1.5 seconds.
Shaco's Hallucinate vanishes for 0.5 seconds.
Zed's Death Mark vanishes for 0.75 seconds.

Invisibility detection

There are various ways for a champion to gain the ability to see stealth. A champion with this ability will see stealthed enemy units as partially translucent. When a revealed stealthed unit leaves the revealed area that unit does not experience a fade time; the unit immediately turns stealthed again. The following is a list of possible ways to detect stealthed champions:

Items

Control Ward - Template:Item data Control Ward
Oracle's Extract - Template:Item data Oracle's Extract
Oracle Lens - Free
Looted Oracle's Extract - with Kleptomancy

Champion abilities

The following abilities can reveal stealthed units for a period of time:

Caitlyn's Yordle Snap Trap and Ace in the Hole, if her target stealths themselves during the channel.
Fizz's Chum the Waters will reveal a stealthed unit if this attaches to the fish.
Karma's Focused Resolve and Renewal
Lee Sin's Sonic Wave
Lulu's Help, Pix! will reveal enemies if they stealth themselves while Pix is attached to them.
Morgana's Soul Shackles
Nidalee's Hunt
Rengar's Thrill of the Hunt reveals the closest enemy champion.
Twisted Fate's Destiny will reveal all enemy champions.
Zyra's Rampant Growth will reveal stealthed units that step over the seeds.

Turrets

Allied turrets have a "true sight" stealth detection range that will reveal any stealthed unit. This range is equal to the turret's attack range. Note that neither inhibitors nor nexuses possess this property.

Items breaking Invisibility

The following in-game elements will break Invisibility upon activation.

Items

Trinkets

Oracle Lens

Items not breaking Invisibility

The following in-game elements will not break Invisibility upon activation.

Consumables

Items

Trinkets

Presence detection without reveal

All abilities that do not require single target to cast can affect stealthed champions (but will not reveal them).

Certain abilities can only be cast if an enemy is in range of the AoE casting circle - these abilities will light up and become available to use even if the only enemy in range is a stealthed enemy.

Hecarim's Spirit of Dread can reveal the position of stealthed champions due to the particle that it generates. The champion will not be revealed.
Camille's Hookshot can detect stealthed champions because gains extra range when it hits the wall with an enemy nearby, including stealthed ones. The champion will not be revealed.
Katarina's Death Lotus can detect stealthed champions due to its working mechanic - can only be used if there's an enemy champion (even stealthed) in its casting range.
Kennen's Electrical Surge can detect stealthed champions due to the particle effect pointing in their direction. The stealthed champion will not be revealed.
Morgana's Soul Shackles can detect stealthed champions due to its working mechanic - can only be used if there's an enemy champion (even stealthed) in its casting range.
Nocturne's Duskbringer will provide semi-reveal if it lands. Though stealthed unit will still be immune to auto attacks and targeted spells, Duskbringer's trail will compromise the position of said unit for 5 seconds, even through movement.
Rek'Sai's Tremor Senses will perceive the position of any moving unit, even stealthed ones.
Soraka's Starcall heal animation shows if the skillshot hit a champion, whether it's invisible or not.
Talon's Blade's End causes struck enemies to leave behind a trail of blood even during stealth, similarly to Nocturne's aforementioned Duskbringer.
Teemo's Noxious Trap will explode but not reveal stealthed champions.
Tryndamere's Mocking Shout can detect stealthed champions due to its working mechanic - can only be used if there's an enemy champion (even stealthed) in its casting range.
Viktor's Chaos Storm will follow a stealthed target and fire it's lightning bolts at it. The stealthed champion will not be revealed.
Vladimir's Tides of Blood can detect stealthed champions due to the particle effect flying in their direction. The stealthed champion will not be revealed.
Warwick's Blood Hunt does not reveal stealthed champions but if they are below half health, he will receive the blood trail and the movement speed bonus.

Skill shots

While skill shots that do damage and/or stun such as Ashe's Enchanted Crystal Arrow will still hit stealthed champions, they will still not be revealed. Note that the visible projectile will stop short of its trajectory and show visual and audio effects (e.g. Dr. Mundo's Infected Cleaver will make a splatter and show a small eruption of blood upon impact) if a stealthed unit is hit, indicating the stealthed champion's presence but not revealing them. Here are some more ways to detect stealthed enemies since they'll function the same as if they are unseen in brush.

Lux's Light Binding will visibly entrap the stealthed champion without revealing the champion.
Morgana's Dark Binding will visibly entrap the stealthed champion without revealing the champion.
Varus' Chain of Corruption will visibly entrap the stealthed champion without revealing the champion.
Zyra's Grasping Roots will visibly entrap the stealthed champion without revealing the champion.
Hook-type skillshots ( Nautilus' Dredge Line, Blitzcrank's Rocket Grab, Amumu's Bandage Toss and in some circumstances, Leona's Zenith Blade and Thresh's Death Sentence) will show the effect of the hook happening without revealing the stealthed champion hit, revealing the champion's location.
Ezreal's Rising Spell Force will grant him a stack for each champion hit with his abilities, revealing if there are stealthed champions nearby.

Forcing enemies out of stealth

Taunting a stealthed enemy will cause him to attack, automatically revealing him and forcing him out of stealth. This can work if you target a visible stealthed unit or if the enemy is currently entering into stealth. With AoE taunts you can force every stealthed champion in the area to attack, even if they are invisible. Note that Rammus' Frenzying Taunt can't be casted on stealth champions.

In the case of Teemo's Guerrilla Warfare, direction targeted skills which can displace, charm or flee him will force him out of stealth.

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