Similar to Madness, Delirium was a mechanic chosen for the Shadows block to reflect Emrakul's slow and sure corruption of the minds of Innistrad's inhabitants
Since blue is popular and blue decks usually have at least a few artifacts, Mogg Salvage is definitely low on the opportunity cost scale
(MSRP $49.99) Disney Lorcana Quest of Wonders: An Illumineer's Lorebook Illumineer Shanzay comes across an old lorebook
An anthem for your creatures for three generic mana is something that many Typal decks would consider running already, but add in its versatility as a mana-fixing mana rock, and you have a super staple for Typal Commander decks everywhere
There isnt much to say about the 26 reprints from Fourth Edition, as they are just the basic color standards, Circle of Protections, Giant Growth, Counterspell, Disenchant, Shatter, etc, but the reprint from Unlimited was celebrated as it was the return of the Icy Manipulator
Nowadays other cards do the job better, at least in Modern
