N-sane Theory Time: Who is the next unrevealed Darkin?

As we know, Darkin are sealed within weapons until they are either consumed by its user to get their power pricelessly or until the user is consumed to become the Darkin liberated. We have example of liberated Darkin in Aatrox, example of struggle for control in Kayne & Raast, possibly example of pact of half-human and half-Darkin in Varus so what we would be missing is an example of champion that already won over the Darkin.

Additionally, each Darkin is conviniently (they have sense for narrative uniqueness) in different weapon. We have one within sword, one within scythe, possibly one within bow. What are we missing? That's correct. A hammer.

So who's the other Darkin? It's Haam, furious Darkin who always goes ham (the kind of guy to dive 1v5, die, then blame his wielder), who resides... Wait for it... Within Poppy's Hammer (act surprised as if you didn't see the thumbnail). She unknowingly conquered him and gained his powers and turned them into light because she was so obdamacian to him that he rather commited suicide than having to listen to her with no escape from the fate worse than being trapped within a hammer.

There's even a skin for alternative universe where Poppy is instantly consumed by the Darkin like a fine burger and turns into this:

http://www.mobafire.com/images/champion/skins/landscape/poppy-noxus.jpg

Alternatively, one Darkin called Faabulo can be trapped within that Taric's sausage beater or whatever he holds.

Note that there is no discussion needed as I base my flawless arguments and undeniable theories on tight contacts within Riot and my years of elaborate espionage within their talkroom.