I also went this route to demonstrate how to make five-color work without breaking the bank with dual lands, so if youve got duals feel free to slot them in
Then if one or more of the chosen permanents are still on the battlefield, you search your library for up to that many land cards, put them onto the battlefield tapped, then shuffle
Ulamog, the Ceaseless Hunger Current Price (via Card Kingdom): $32.99 When you talk about a card being oppressive, its harder to think of a better representative than Ulamog, the Ceasless Hunger
The trick in blue is to take advantage of blue's ability to change lands into basic land types
While you can certainly whiff here and mill only a few cards, since Mirror-Mad Phantasm puts itself right back into play, you can easily roll the dice again
That means only 1/62 CBs will have a particular mythic etched foil, and youre 1/31 to get whichever etched foil rare you wanted