Zoe done fucked up now...
Om the recent Ask Riot thing, it was asked why Zoe, a teleporting, portal-hopping bundle of mayhem has a key on her belt. This was the answer from Riot KindleJack:
"The key Zoe carries around was actually “borrowed” from another champion; you’ll notice it’s missing from his updated splash art. As to what it opens? Probably best we never find out…"
Well, let's think here. The champion is:
- a guy
- getting a new splash
- the key is in the current splash
- it will be really bad if whatever the key opens is opened
Well ladies and gentlemen, given these clues, I have one primary suspect: 
Observe
Now obviously, the keys aren't identical, however they share a design type. Both have:
- A hole on the handle part
- A double prong on the end of the key
- The second prong is larger than the first
Now some of the differences could be chalked up to time differences; Thresh was released almost 5 years ago and Zoe literally just came out. Also while Thresh has the key, it's glowing and appears altered by some energy, which could mean that only he can use the key.
Either way, if she did indeed steal Thresh's key to heaven-only-knows what, odds are very high there'll be hell to pay.
Let me know what you guys think, but that's my thoughts on it. Couldn't find keys in any other splashes, so my boi Thresh seems to suspect numero uno.
Peace.
Edit: yeah irs fid. Ignore me.
key. Don't think it's