Its power, toughness, and the number of folds it has (zero) remains the same
You'll see this on a large scale, like the Wicked Slumber seizing the population, or with something as simple as some fae trickery
Delirium was also a core mechanic of the next set in this block, Eldritch Moon , which featured Emrakul's emergence into the plane and subsequent warping of the plane into a Lovecraftian horror: Since its original printing, Delirium has shown up as a mechanic in only a few other Magic sets, Modern Horizons 2 and 3 , and Duskmourn: House of Horror
This ones great because it lets you see the most cards without secondary assistance from something like a shuffle effect
New strategy caused long wait times and limited card access, benefitting scalpers over fans
Liliana of the Veil might offer more value over a long game, but it loses a lot of potency on the draw