The simpler text on the card is a huge bonus for those pursuing an easy to understand cube
Instead, you put any number of conspiracies from your card pool into the command zone as the game begins
Uro, Titan of Natures Wrath may have been banned in some constructed formats, but its still in high demand in Commander
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
Its the combination of all of these things that has Emiel the Blessed at the top of our list of the best flicker cards in MTG, but its a very well-contested list, so most of these cards could be up here
The artifact decks were often the best at this, because they brought out their mana so fast that they could shrug off losing two lands while they crippled their opponent's development, and decks with green mana creatures like Birds of Paradise often used the same plan
