More specific details about Gankplank skin

So according to Riot we get a gankplank skin if we have used him in a matchmade game in the Bilgewater event. 1) What counts as a 'matchmade game'? 2) What date did the event start?

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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