Insufficient data currently exists to properly document these events, because they were run so long ago that no wiki editors who actually played them have come forward to do so.
If you have information on one of these events, add it in its section below. If you have sufficient to start an article, simply follow the link. You will end up at this article, but at the top of the page will be a small message and a blue link, "redirected from (link)". Follow the link and edit that redirect article.
Contents
Chandra's ChallengeDovin Baan's Challenge
An Individual, Legacy, PvE event
Planeswalker Arena
An Individual, Legacy, PvP event
Breaking PointsInventor's FairQuick Battle
An Individual, PvP event which emphasized speed to complete as many games as possible within the running time. It was cancelled before Oktagon implemented Standard rotation. A daily event like Training Grounds, it was more directly competitive, with placement rewards of Rare cards and a Big Box (14 packs + Rare / Mythic) for first place. Decks became more streamlined to complete it as often as possible in the shortest amount of time,[1] and there was a noticeable amount of cheating, which Oktagon made a major and effective push to stop.
Saheeli Rai's ChallengeTrial of StrengthSee also
Planeswalker color restriction
White, Blue
· 100 
Red
Green