Artifact-centric commanders like Urza, Lord High Artificer or Arcum Dagsson are notorious for playing all these powerful cards, but there are also plenty of scenarios where they will have a lot of expensive artifacts that have been ramped or cheated into play without an easy way to repeat the process once all their artifacts are off the battlefield
Apart from mutate cards to trigger that ability, I guess you could use Stuffy Doll and Brash Taunter, or fill your deck with cards that grant abilities to your commander like backgrounds and the legendary familiars (Kediss, Falthis, et al)
The recently announced Fallout Rad Superdrop features one of the strangest uses of an overlay in MTG's history
It triggers other enchantments when cast late while benefiting from effects like Sterling Grove and Calix, Destiny's Hand
[17] In April 2016, an Alpha Black Lotus card graded as a 9.5 out of 10 was sold on eBay for $38,000
Not only is The List being included with the new MTG Eldraine set, but also Enchanting Tales, a series of enchantments from the history of Magic