Arena finally getting BO3 direct challenge update(14/02). So i thought about Koh with sideboarding, anybody interested?

How does this work? I've been pretty slow with collecting cards even though I've drafted up to plat, way more than I thought I would, so I only have like 2 finished decks (plus mono red, but meh, quests only) and a bunch of things partway there. Rare wc are such a huge choke.

If it's a bo3 bring a deck I'm in, could do with getting better at bo3. But I think past koh have been using like 3 decks.

edit: thinking about it I could bring mono-u or mono red as a third deck, neither are really finished for bo3 since I don't normally play them, but I guess the sideboards can avoid rare wc pretty easily.

I'm always interested in anything Bo3. Bo1 kinda got to me after last season's grind...