Summoner Spells: Cleanse & Exhaust
I've almost played 200 games and have never seen anybody take this spell. I've seen the other 8 used commonly, but not once have seen cleanse. Not even when spectating high elo/professional matches. Then I came up with 2 ideas.
1 What if cleanse cool down reset when you got a kill?
Emphasis on KILL
Not takedown
It would make the spell way more appealing to the juggernaut subclass, who are as susceptible to getting lockdown CC killed as squishy champs.
Also keep in mind that taking cleanse over another spell is still a big sacrifice. You'd have to replace a "core" summoner spell to make room for cleanse which only offers a spell break and increased tenacity.
2 Increase the tenacity bonus to 5 seconds.
It should decrease tenacity and lower attack speed on top of what it already does. Tenacity debuff was added in game on Ornn's release and would be a nice addition to the summoner spell. By definition, it makes sense.
lol