The History of Delirium in MTG Delirium first appeared in Magic during the Shadows over Innistrad block in 2016
Since I just used CW01 as an example, let's just use that: CW01 This code has three distinctive pieces of information C W 01 the first letter, the second letter and the two digit number
I think that in a normal set they wouldnt have gone so hard on the silly name, but it fits in with Modern Horizons in a way that it wouldnt in a normal set
Its also very poorly priced
Honorable Mention: Impulse Drawing Impulse drawing, nicknamed that way after Act on Impulse, is a specialty of red cards that exile cards from the top of a library and let you play those cards for a limited period of time
Its prowl cost gives you an extra turn spell, and these three can all be brought to the top of your deck with Faerie Harbinger (as expensive as the Harbinger is)