Fizz being untargetable while using 
Playful. Take note that units in the untargetable state usually have a transparent health bar.
Untargetability refers to units in a state where they are no longer valid targets for 
aura, 
unit-targeted, 
auto-targeted, 
direction-targeted and 
ground-targeted effects, including attacks, abilities, item effects and summoner spells. Becoming untargetable is not a form of 
invulnerability, and units will still suffer the effects of active applied 
damage over times, delayed detonations (e.g. 
Death Mark, 
Sleepy Trouble Bubble, 
Time Bomb) and 
tethers.
The act of becoming untargetable will also 
interrupt any effects that have already acquired the unit as a target (e.g. an oncoming basic attack will simply disappear) as well as causing AI-controlled units (e.g. 
turrets, 
minions, 
monsters) to acquire a new target (also known as "dropping aggro"). An exception to this are some 
unstoppable basic attacks, which ignore whether or not their target becomes untargetable during their windups and will bypass the effect (i.e - 
Blitzcrank's 
Power Fist will still 
knock up and damage a target that becomes untargetable in the period of the windup). This is specific to unit-targeted effects.
The telegraph from 
Karthus' 
Requiem will be placed on untargetable enemies, although the damage itself is classified as auto-targeted effect that occurs at the end of the channel time.
The following can affect a unit even through untargetability:
Nocturne's Paranoia - the nearsight- Graves' Smoke Screen - the nearsight
- Ryze's Realm Warp - the blink
- Soraka's Wish - the heal
- Lulu's Wild Growth - the knock up
- Cloud Rift's speed zone - the movement speed boost
Untargetability
- Champions
- Camille's The Hextech Ultimatum
- Evelynn's Last Caress
- Fizz's Playful
- Galio's Hero's Entrance
- Karthus' Death Defied
- Kayn's Umbral Trespass
- Kled's Dismount
- Kog'Maw's Icathian Surprise
- Maokai's Twisted Advance
- Poppy's Keeper's Verdict
- Ryze's Realm Warp
- Tahm Kench's Devour
- Urgot's Fear Beyond Death
- Vladimir's Sanguine Pool
- Xayah's Featherstorm
- Yuumi's You and Me!
- Zed's Death Mark
- Wards
The following 
wards are untargetable to allies only.
- Champion summoned units
- Aphelios' Sentry (while inactive)
- Azir's Sand Soldiers
- Bard's Caretaker's Shrine
- Caitlyn's Yordle Snap Trap
- Elise's Volatile Spiderling
- Illaoi's Tentacles during Leap of Faith
- Illaoi's Test of Spirit
- Clone is untargetable to its allies only.
- Jarvan IV's Demacian Standard
- Untargetable to enemies only.
- Jinx's Flame Chompers!
- Kindred's Wolf
- Lissandra's Iceborn Subjugation
- Lulu's Pix, Faerie Companion
- Maokai's Saplings
- Orianna's Ball
- Neeko's Shapesplitter
- Clone is briefly untargetable.
- Senna's Mist Wraiths
- Only targetable to Senna.
- Shaco's Jack in the Box
- Untargetable while inactive/stealthed to enemies.
- Shadow Assassin's Blade's Reach
- Syndra's Dark Spheres
- Thresh's Dark Passage
- Untargetable to enemies only.
- Wukong's Warrior Trickster
- Untargetable to allies only.
- Wukong's Nimbus Strike
- Yasuo's Last Breath
- A clone-type unit of him will briefly appear dashing in the direction of his target.
- Zac's Goo
- Zed's Shadows
- Zyra's Seeds
- Untargetable to enemies only.
- Summoner Spells
- Structures
- All turrets are untargetable while a lower tier turret in that lane remains standing.
- Destroying any inhibitor makes the nexus turrets targetable while one remains destroyed.
- An inhibitor is untargetable while a turret remains standing in front.
- The nexus is only targetable while both its turrets as well as at least one inhibitor are destroyed.
- The Nexus Obelisk is always untargetable.
Azir's 
Sun Disc do not affect the above untargetability parameters.
Stasis
Stasis applies all the effects of becoming untargetable, but also makes the target invulnerable and unable to act.
Resurrection
The following Resurrection effects also use Stasis effects:
Vanish
Vanish applies all the effects of becoming untargetable, but also makes the target unable to act and physically invisible (but does not grant 
stealth). Uniquely, 
Paranoia's 
nearsight won't be applied to a target while they are vanished.
