An assist is the action of helping an allied champion to kill someone. You can score an assist, either by hitting the champion in the last 10 seconds before they die or by passively contributing during this period of time.
Scoring an assist guarantees that you will get a certain amount of gold. Gold is equal to 50% of the amount awarded to your assassin and divided equally among all champions who have scored assists in the assassination.
Secondary system
Champions also gain assists on kills if they:
- contributed to the battle via active abilities but did not deal damage e.g. CC
- debuffed an enemy but they were immune to the damage.
- supporting a champion that contributed to the kill , e.g. healing an allied champion.
Champions will not gain assists if they:
- use blind, reveal or attack speed slow
Items benefiting from assists
Athene's Unholy Grail - Restores 12% of your max mana on kill or assist. 2800 Gold.
Sword of the Occult Unique passive - Your champion gains +5 damage per stack, receiving 2 stacks for a kill or 1 stack for an assist. This effect can stack 20 times; you lose a third of your stacks if you die. At 20 stacks, your champion's movement speed is increased 15%. 1369 Gold.
Mejai's Soulstealer Unique passive - Your champion gains 8 ability power per stack, receiving 2 stacks for a kill or 1 stack for an assist. This effect can stack 20 times; you lose a third of your stacks if you die. At 20 stacks, your champion's cooldowns are reduced by 15%. 1235 Gold.
Bonetooth Necklace Unique Passive - 
Rengar collects trophies when killing Champions, and gains bonus effects based on how many trophies he has. Kills and assists grant 1 trophy, and 1 trophy is lost on death.
- 3 Trophies: +10 armor penetration
+5% cooldown reduction - 6 Trophies: +25 movement speed
- 9 Trophies: Rengar's leap gains 150 bonus range.
- 14 Trophies:
Thrill of the Hunt's duration is increased by 3 seconds. Additionally, Rengar's next ability used after activating Thrill of the Hunt generates 1 bonus Ferocity. 800 Gold.
- 3 Trophies: +10 armor penetration
Skills benefiting from assists
Shadow Dance de 
Akali (Active): Akali moves through the shadows to quickly strike her target and deal magic damage. Akali gains an Essence of Shadow once every few seconds up to a total of 3, affected by cooldown reduction. The time to gain a charge doesn't count when at maximum charges. Additionally, Akali gains an Essence of Shadow for a kill or an assists.
Dark Frenzy de 
Evelyn (Active): Evelynn removes all slows affecting her, gains bonus movement speed for 3 seconds and ignores unit collision. Champion kills and assists refresh Dark Frenzy's cooldown.
Voracity de 
Katarina (Innate): After a kill or an assists, Katarina's cooldowns on all her abilities are reduced by 15 seconds.- Evolved Leap Evolved Leap de
Kha'Zix (Active): Kha'Zix leaps to an area, dealing physical damage to enemies in the area. Kills and assists refreshes Leap's cooldown. 
Highlander of 
Master Yi (Active): Increases Master Yi's movement speed by 40% and attack speed for a few seconds, as well as making him immune to any slow effects. Additionally, killing a champion refreshes all of Master Yi's Abilities. Assist refreshes all abilities by half.
Rocket Jump de 
Tristana (Active): Tristana fires at the ground to propel herself to a target location, dealing magic damage and slowing surrounding units by 60% for 2.5 seconds when she lands. On kills or assists, Rocket Jump's cooldown resets.
Burst of Speed de 
Fiora (Active): Fiora gains additional attack speed for 3 seconds. Each autoattack or Lunge she lands during this time increases her movement speed for 3 seconds, stacking up to 3 times. Killing a champion refreshes the cooldown on Burst of Speed. Assists reduce the cooldown by half of the base amount.
Living Vengeance de 
Varus (Innate): On champion kill or assists, Varus gains 40% attack speed for 6 seconds. On minion kill, Varus gains 20% attack speed for 3 seconds.
See also
- Death
- Kill
- Kill to Death Ratio
