Revive is a 'Non-Target' Summoner spell that instantly brings a dead player back to life and gives them a moderate speed boost for a short duration. It becomes available for use only when the player's champion has been slain.
Revive can make a slain champion's return to the fray much faster than if they had waited to respawn. This sudden burst of recovery from the grave can bolster a team with the stamina needed to turn the tide of battle.
On Summoner's Rift, Revive's speed boost is powerful enough to allow players to intercept fights and objectives that are close to their home base. This effect is even more prominent on smaller maps like The Crystal Scar and Twisted Treeline, as it can allow a once-dead player to quickly approach almost any map objective with ease. Its long-distance mobility as a summoner spell is rivaled only by Summoner Teleport.
The bonus health granted from Revive's companion mastery Summoner's Insight brings added weight to a champion's return, increasing Revive's effectiveness for fighters, tanks, and aggressive assassins alike.
In later game phases, longer death timers serve to further increase the impact of this spell. For example, if a late-game team fight ends with multiple players on both sides dead, Revive can greatly shift the balance of power toward the user's team for as much as 70 seconds or more.
While the effects of Revive are dramatic and potentially game-altering, the spell has a very long cooldown timer. This challenges players to carefully coordinate the use of Revive with other high-profile game events like Turret fights and neutral monster objectives such as Baron Nashor.
Revive synergizes well with champions that have an 'on-death' innate like Karthus and Kog'Maw.
Other movement speed and mobility effects can be combined with Revive, allowing players to traverse even greater distances with breakneck speed and initiative.
The boots enchantment Homeguard pairs exceedingly well with Revive, as a revived player will almost always trigger Homeguard's otherwise uncommon condition - being at the summoner's platform.
At 9 minutes, Revive has the longest cooldown of any spell or ability in League of Legends.
This cooldown is one of the longest timed effects in the entirety of the game, second only to Baron Nashor's initial spawn timer of 15 minutes on Summoner's Rift.