Notes

  • Sources of summoner spell cooldown reduction stack additively except for the ARAM buff, which stacks multiplicitively with other sources sources save for Ionian Boots of Lucidity item Ionian Boots of Lucidity.
Summoner spell CDR
Base cooldown ▶ 300s
(FlashTeleport)
240s
(ClarityHeal)
210s
(CleanseExhaustIgnite)
180s
(BarrierGhost)
75s
(Smite)
80s
(Mark)
Cooldown reduction icon Cooldown reduction
5% (Cosmic Insight rune) 285s 228s 199.5s 171s 71.75s N/A
10% (Ionian Boots of Lucidity item) 270s 216s 189s 162s 67.5s N/A
15% (Ionian Boots of Lucidity itemCosmic Insight rune) 255s 204s 178.5s 153s 63.25s N/A
25% (Unsealed Spellbook rune) 225s 180s 157.5s 135s 56.25s N/A
30% (Unsealed Spellbook runeCosmic Insight rune) 210s 168s 147s 126s 52.5s N/A
35% (Unsealed Spellbook runeIonian Boots of Lucidity item) 195s 156s 136.5s 117s 48.75s N/A
40% (Unsealed Spellbook runeIonian Boots of Lucidity itemCosmic Insight rune) 180s 144s 126s 108s 45s N/A
40% (Howling Abyss icon) 180s 144s 126s 108s N/A 48s
43% (Howling Abyss iconCosmic Insight rune) 171s 136.8s 119.7s 102.6s N/A 45.6s
50% (Howling Abyss iconIonian Boots of Lucidity item) 150s 120s 105s 90s N/A 40s
52.5% (Howling Abyss iconIonian Boots of Lucidity itemCosmic Insight rune) 142.5s 114s 99.75s 85.5s N/A 38s
55% (Howling Abyss iconUnsealed Spellbook rune) 135s 108s 94.5s 81s N/A 36s
58% (Howling Abyss iconUnsealed Spellbook runeCosmic Insight rune) 126s 100.8s 88.2s 75.6s N/A 33.6s
65% (Howling Abyss iconUnsealed Spellbook runeIonian Boots of Lucidity item) 105s 84s 73.5s 63s N/A 28s
68% (Howling Abyss iconUnsealed Spellbook runeIonian Boots of Lucidity itemCosmic Insight rune) 96s 76.8s 67.2s 57.6s N/A 25.6s


Patch History

V7.22 Added
  • Inspiration icon Inspiration Keystone rune.
    • Passive: Reduces the cooldown of summoner spells by 25%.
    • Additionally, you may swap your Summoner Spells while at the Shop by exchanging Summoner Shards. You gain your first Summoner Shard at 2:00, and gain another every 6 minutes thereafter, up to a maximum of 2 at a time.
    • Newly acquired summoner spells will inherit any remaining cooldown of the summoner spell it is replacing.
    • Swapping to Smite Smite during a game will not grant access to Jungler items, and you may not have the same summoner spell twice.

References