Revive.

Riots explanation for removing revive was because it was underused and it wasn't really a viable summoner spell.

Yet we keep {{summoner:2}} (now there's a trinket for this why would you keep it?) I haven't seen this summoner in any game mode other than the Howling Abyss, and even then, with the addition of poro toss, it is extremely rare.

But still they had to get rid of revive? I believe you can have more friend with revive than the previous two summoner spells, and removing revive makes the game slightly less diverse which Riot should be looking to. I believe that Riot should re-add, or update these underused summoner spells to bring them back into the game... Why would you just remove one spell instead of consulting the community that play your game, and at least trying to fix it. R.I.P. revive