With some careful deck building (mostly playing some big card-draw spells you can cycle into with Unpredictable Cyclone to make sure you always have some cycling cards in hand), you should be able to mostly play your entire deck in a single turn by cycling, casting stuff (including card-draw spells) for free with Unpredictable Cyclone, drawing into more cycling cards, and cycling them to trigger Unpredictable Cyclone against and again until you've essentially cast your entire deck
For higher-end purchases, buy graded from a reputable seller and verify the certification number with the grader
Delirium is a grindy, yet powerful mechanic that takes some set up, but can reap you some sweet rewards
However, French print runs of the Base Set 1st Edition were considerably lower than English print runs
Valued on TCGplayer at a market price of $3.42 USD at the time of writing, this is currently the least valuable of the Legendary cards
March 24, 2023 Q&A [ST-09] has been released