The fact that she flips into a Planeswalker just by drawing three cards, which, by the way, her Clue helps you do, makes her an absolutely fantastic card in competitive formats
Smoothing out draws by ditching lands or nonlands is always an attractive addition to a game of Magic because it reduces the extreme "feel-bad" scenarios of mana flood and mana screw
These decks would presumably use something like Shuko or an il-Kor creature that can be used for free repeatedly in a turn to trigger his static ability
Before that, another singular entry (which I wont count), via Blaster, Combat DJ in 2022, before we got a ton of it as a featured mechanic in MH2
I went for a personal favorite, whiscash, which was very fun for me