Stealth is the mechanic by which some units become invisible for a determined period of time. Stealth is divided into three categories: Ambush 2 Camouflage (or Strategic stealth), Twilight Shroud old2 Invisibility (or Tactical stealth) and Noxious Trap Stealthed traps.

Camouflage

Camouflage is a form of stealth that is activated preemptively in order to ambush an enemy or to bypass the enemy's vision.
  • Camouflaged units are temporarily revealed while nearby and in the line of sight of a champion, are within the vision radius of enemy Control Ward item Control Ward or enemy turret, or if revealed by an effect that grants unit-vision (e.g. some champion abilities, Scryer's BloomSquare Scryer's Bloom and Hextech Sweeper item Arcane Sweeper).
  • Camouflaged units will briefly shimmer whenever they take damage (e.g. if hit by a skill shot). A unit cannot shimmer more frequently than once per second, and shimmering does not make a unit targetable nor remove the stealth effect.
  • Oracle Lens item Oracle Lens will outline Camouflaged units.
Invisibility Shimmer


Champions

Invisibility

Invisibility is a form of stealth that is activated while in-combat to grant a champion a reprieve, or the ability to reposition.
  • Invisible units can only be revealed by enemy turrets or True Sight icon true sight and will briefly shimmer whenever they take damage (e.g. if hit by a skill shot). A unit cannot shimmer more frequently than once per second, and shimmering doesn't make a unit targetable nor remove the stealth effect.
  • Effects that grant unit-vision (but not True Sight icon true sight) will still debuff invisible enemies, including visible over-head indicators, but will not grant unit-vision or targetability.
  • Oracle Lens item Oracle Lens will outline invisible units.
Champions

Stealthed traps

Stealthed traps have a unique form of stealth that cannot be seen except through Hextech Sweeper item Arcane Sweeper, Control Ward item Control Wards, Oracle Lens item Oracle Lens, or an enemy turret.
Champions
Items

Stealth Ward icon Stealth Wards or Totem Ward icon Totem Wards from:

Vanish

Vanish briefly removes a unit from the game, rendering them untargetable, and completely undetectable/invisible even when under Oracle Lens item Oracle Lens. Tethered abilities will persist Vanish depending on the refresh rate (i.e. how often the tether checks if the target is still present).
Champions

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

Champion abilities

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

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

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.

  • HecarimSquare Hecarim's Spirit of Dread Spirit of Dread can reveal the position of stealthed champions due to the particle that it generates. The champion will not be revealed.
  • CamilleSquare Camille's Hookshot 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.
  • KatarinaSquare Katarina's Death Lotus 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.
  • KennenSquare Kennen's Electrical Surge Electrical Surge can detect stealthed champions due to the particle effect pointing in their direction. The stealthed champion will not be revealed.
  • MorganaSquare Morgana's Soul Shackles 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.
  • NocturneSquare Nocturne's Duskbringer 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'SaiSquare Rek'Sai's Burrow Tremor Senses will perceive the position of any moving unit, even stealthed ones.
  • SorakaSquare Soraka's Starcall Starcall heal animation shows if the skillshot hit a champion, whether it's invisible or not.
  • TalonSquare Talon's Blade's End Blade's End causes struck enemies to leave behind a trail of blood even during stealth, similarly to NocturneSquare Nocturne's aforementioned Duskbringer Duskbringer.
  • TeemoSquare Teemo's Noxious Trap Noxious Trap will explode but not reveal stealthed champions.
  • TryndamereSquare Tryndamere's Mocking Shout 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.
  • ViktorSquare Viktor's Chaos Storm Chaos Storm will follow a stealthed target and fire it's lightning bolts at it. The stealthed champion will not be revealed.
  • VladimirSquare Vladimir's Tides of Blood Tides of Blood can detect stealthed champions due to the particle effect flying in their direction. The stealthed champion will not be revealed.
  • WarwickSquare Warwick's Blood Hunt 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 AsheSquare Ashe's Enchanted Crystal Arrow 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. MundoSquare Dr. Mundo's Infected Cleaver 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.

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 RammusSquare Rammus' Frenzying Taunt Frenzying Taunt can't be casted on stealth champions.

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