Insufficient data currently exists to properly document these events, because they were run so long ago that no wiki editors who actually played them remember all the details, or have come forward to do so. Even where it is possible to compile information from coalition records, some details are missing.
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.
All the events are marked as presumed: Legacy. But there was a period of time when Standard rotation had not been implemented, and everything was playable. Quick Battle is confirmed to be from that time.
Because Saheeli Rai's Challenge had as its prize, the Planeswalker of that name, we might presume that so did Chandra's Challenge and Dovin Baan's Challenge.
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.
Planeswalker color restriction
White, Blue
· 100 
Red
Green