Stormraider’s Surge is no longer in League of Legends. It was a keystone mastery from the Cunning tree, removed along with the whole masteries system when Runes Reforged arrived. It’s still worth understanding, because it did something almost nothing else did: it dealt no damage at all.
What it was
| Parameter | Value |
|---|---|
| Type | keystone mastery, Cunning tree |
| Tier | 6, the highest in the tree |
| Rank | 1, could not be upgraded |
| Requirement | 17 points in Cunning |
| Trigger | dealing 30% of a champion’s maximum health within 2.5 seconds |
| Effect | +40% movement speed and 75% slow resistance for 3 seconds |
The trigger demanded commitment
The threshold, 30% of maximum health in a rolling 2.5-second window, was the whole design. Random poke couldn’t reach it. You needed a concentrated spike of damage, so the rune rewarded champions who committed to a combo.
- Good fit: ADCs with a short burst window (Lucian’s Q into an auto-attack, Caitlyn’s trap and headshot) and AP assassins with a full combo (Zed Q+E+Q+R).
- Poor fit: poke champions with slow damage output, such as Xerath, who rarely dealt 30% in 2.5 seconds against a target that wasn’t squishy.
Slow resistance mattered as much as the speed
Most discussions revolved around the +40% movement speed. The stronger half, though, was probably the 75% slow resistance. For three seconds, every slow worked at a quarter of its value: Nunu’s W, Ashe’s Q volley, the proc from Frozen Mallet.
For a kiting ADC or a mobile assassin with the rune active, that meant opponents practically couldn’t slow them. That’s exactly why it was as good for escaping as it was for chasing.
Playing with the rune active
Three seconds doesn’t sound like much, but in practice it was a window that decided fights. Typical uses:
- All-in and chasing. After a combo that knocked the target below the threshold, you caught up with them before they could escape to their tower.
- Disengaging after a trade. The same rune worked in reverse: you landed your burst and walked out of range before they could respond.
- Repositioning mid-teamfight. With 75% slow resistance, you could walk through an area the enemy had “locked down” with slows.
Why it disappeared
Not because it was bad. Runes Reforged replaced the whole masteries system, and the “speed for burst” idea survived in various runes, just not as a single keystone. What disappeared is the specific combination: a keystone at the top of the tree that gave mobility and immunity to slows instead of damage.
FAQ
No. It disappeared along with the masteries system, which was replaced by Runes Reforged.
After you dealt 30% of a champion’s maximum health within 2.5 seconds, it gave you 40% movement speed and 75% slow resistance for three seconds.
None at all. It was a pure movement keystone, which set it apart from both Thunderlord’s Decree and Deathfire Touch.
Those with concentrated burst: Lucian, Caitlyn, Zed and similar. Poke champions with slow damage output rarely reached the threshold in time.
Because for three seconds it cut every slow down to 25% of its effect, so kiting the wearer was almost impossible.
Information verified as of 7 September 2026. This article describes removed content, so nothing in it will change anymore. More League articles: Deathfire Touch, also removed, and Sword of Blossoming Dawn, which is still in the game. Everything about League is in the League of Legends section. Elsewhere: gems in Diablo 4, skill order in Crimson Desert and the Game guides section.