Q: What does CC Immunity do against Stun?

CC Immune is the buff that card text calls "Unstoppable" . Quicksilver reads "Combat Start: Unstoppable". No card on this site prints the words "crowd control" at all. So Unstoppable is the word to look for. It fully negates a stun the moment the unit has it. The stun is never applied, no duration ticks, and no ability lock happens. Immunity prevents application. It does not strip an already-active stun. A CC-Immune source granted at combat start is the common pattern, e.g. an 18-second window. It protects you only inside that window. Once it expires, future stuns land normally. Note: CC Immune is also distinct from Untargetable and Invulnerable . A CC Immune unit is still targetable and still takes damage, it is just immune to the disable layer. An Invulnerable unit takes no damage.

Q: What's the difference between Stun, Root, Silence, and Knock-Up?

They overlap but are not identical. Stun locks all three actions: movement, attacks, and ability casts. Root only locks movement. A rooted unit can still attack and cast. Silence only locks ability casts. A silenced unit can still move and attack. Knock-Up (airborne) lifts the unit and applies a stun on top for the airborne duration. So it reads as a stun plus forced movement. Note: Tenacity reduces stun, root, and silence durations. It does not reduce airborne or knock-up duration. That is the practical reason knock-ups feel "heavier" than equal-duration stuns.

Question 1

What is Stun in TFT?

Accepted Answer

A stunned unit cannot move, cannot declare attacks, and cannot cast its Special Ability for the duration. Those three locks land together. That makes Stun the strongest single-keyword crowd control, because it removes every active option at once.

The unit is still on the board. It is still selectable as a target, and it still takes damage normally. Stun is a disable, not a disappear.

Note: Durations are short and source-specific. Most TFT stuns sit in the roughly 1 to 2 second range.

Question 2

Do stunned units still gain mana and take damage?

Accepted Answer

Yes to both. Stun is a disable, not an immunity.

Stunned units remain valid targets.
They take full damage.
They still gain mana from being damaged. That applies to the units that gain mana from damage at all, per the role-mana rules.

They cannot generate the per-attack mana from their own auto-attacks while stunned, because they cannot declare attacks.

Note: Stunning a frontliner does not stop their tank-mana fill from incoming damage. It just prevents them from spending it.

Question 3

If a stun ends with the unit's mana bar full, what happens?

Accepted Answer

It casts immediately. Once the stun expires, a stunned unit "will immediately use their special ability if given a chance". There is no extra delay just because the cast was suppressed.

So delaying a cast with stun only buys time. If the unit was already mana-full when stunned, the spell fires the instant the stun drops.

Note: To stop a cast entirely, kill the unit before the stun ends. Or chain another disable so it never gets that window.

Question 4

If a stunned unit gets stunned again, do the durations add up?

Accepted Answer

No. Stun durations do not sum. When a fresh stun lands on an already-stunned target, the longer remaining duration is what holds.

A shorter incoming stun on top of a longer one is wasted.
A longer one effectively replaces a shorter remaining stun.

Two 1-second stuns fired back-to-back do not produce a 2-second stun on the same target. They only chain if the first has already, or nearly, expired when the second connects.

Note: Plan CC (crowd control) chains so disables are sequential, not piled.

Question 5

Does Tenacity reduce stun duration, and can the enemy reduce my Tenacity?

Accepted Answer

Yes to the first, no to the second. Tenacity is a percent reduction applied to incoming disables, including Stun. The duration is snapshotted at the moment the stun lands. It is not recalculated mid-disable.

30% Tenacity turns a 2.0 second stun into 1.4 seconds.
The duration floor is 0.3 seconds. You cannot zero a stun out.

There is no current-set effect that reduces enemy Tenacity. Tenacity-reduction debuffs such as Brittle are a base League of Legends mechanic, not a TFT one. So the only way Stun lands harder is if the target simply has little or no Tenacity.

Note: Tenacity does not reduce airborne or knock-up duration. See the knock-up answers below.

Question 6

What does CC Immunity do against Stun?

Accepted Answer

CC Immune is the buff that card text calls "Unstoppable". Quicksilver reads "Combat Start: Unstoppable". No card on this site prints the words "crowd control" at all. So Unstoppable is the word to look for.

It fully negates a stun the moment the unit has it. The stun is never applied, no duration ticks, and no ability lock happens. Immunity prevents application. It does not strip an already-active stun.

A CC-Immune source granted at combat start is the common pattern, e.g. an 18-second window. It protects you only inside that window. Once it expires, future stuns land normally.

Note: CC Immune is also distinct from Untargetable and Invulnerable. A CC Immune unit is still targetable and still takes damage, it is just immune to the disable layer. An Invulnerable unit takes no damage.

Question 7

What's the difference between Stun, Root, Silence, and Knock-Up?

Accepted Answer

They overlap but are not identical.

Stun locks all three actions: movement, attacks, and ability casts.
Root only locks movement. A rooted unit can still attack and cast.
Silence only locks ability casts. A silenced unit can still move and attack.
Knock-Up (airborne) lifts the unit and applies a stun on top for the airborne duration. So it reads as a stun plus forced movement.

Note: Tenacity reduces stun, root, and silence durations. It does not reduce airborne or knock-up duration. That is the practical reason knock-ups feel "heavier" than equal-duration stuns.

Question 8

Is Sleep the same as a Stun?

Accepted Answer

No. It starts out the same, but it ends in a different way.

Lillia puts enemies to Sleep. A sleeping target cannot move, attack or cast. That part is just like a Stun.

Damage does not end a Stun.
Sleep ends early once the target takes enough damage.

Note: No source confirms that Sleep sets off effects that trigger on a Stun. One of them is the item that strikes a stunned enemy with lightning. Until someone confirms it, do not build around it.

Question 9

How long does a knock-up last?

Accepted Answer

There is no global knock-up duration. Each ability sets its own, and balance patches retune them. A knock-up that runs 1.75 seconds today can be cut to 1.5 in the next one.

Most land in roughly the 1 to 1.75 second range.

Note: Read the ability tooltip for the exact number. Never assume a fixed "knock-up duration" exists across the game.

Question 10

If a unit gets knocked up while already airborne, do the durations stack?

Accepted Answer

No. Airborne effects do not sum. The wiki's general rule is that "the most recent move block will overrule any previous move blocks". The forced movement of a fresh knock-up overrides any previous airborne or dash on the same target.

In practice, a new knock-up landing on a target already in the air replaces whatever was running. It does not extend it.

Note: Chaining knock-ups only buys more total disabled time when each one lands just as the previous airborne is ending. It buys nothing while the previous one is still active.

Question 11

What's the difference between Knock Up, Knock Back, Knock Aside, and Pull?

Accepted Answer

All four are sub-types of airborne. They share the same disable layer: movement, attacks, and ability cast are all locked. They differ in the forced-movement vector.

Knock Up lifts the target on the spot.
Knock Back shoves the target away from the source.
Knock Aside pushes the target perpendicular to the cast direction.
Pull drags the target toward the source.

Because they share the airborne tag, every one of them is equally immune to Tenacity reduction. Every one of them is equally prevented by CC-immune effects.

Note: The geometric difference matters for board positioning, not for the disable strength itself.

Question 12

Are there effects that grant knock-up-specific immunity, separate from full CC immunity?

Accepted Answer

Yes. The game ships occasional effects that protect specifically against knock-ups, or against being moved at all. They do this without making the unit fully CC-immune. The canonical pattern is an augment or trait line that reads "cannot be knocked up" or "immune to forced movement".

These are distinct from a full CC-immune buff. A knock-up-only-immune unit can still be stunned, rooted, or silenced normally. It just can't be made airborne.

Note: Read the exact tooltip. The phrases "immune to crowd control", "immune to knock-ups", and "cannot be moved" are three different protections with three different coverage areas.

Question 13

Does a CC-immunity buff protect a unit from stuns for the whole fight?

Accepted Answer

Usually, no. Most CC-immune sources are time-windowed, not full-duration. The canonical example grants immunity for the first 18 seconds of combat. Outside that window, stuns land normally.

A few traits or augments grant CC-immune permanently while a condition holds. Those are the exception, not the rule.

Note: Two practical consequences follow.

Late-fight stuns still pin a CC-immune carry once the early-combat shield expires.
If you apply CC, track which enemy units are still inside their immunity window before committing a hard stun on cooldown.

Stun

Items that apply, benefit from, or counter Stun (2)

Champions that apply Stun (9)

Augments that apply Stun (1)

Wisps that apply Stun (4)

What enables Stun (4)

What counters Stun

What Stun counters

See also

Frequently asked questions

Description

Items that apply, benefit from, or counter Stun (2) #

Champions that apply Stun (9) #

Augments that apply Stun (1) #

Wisps that apply Stun (4) #