Howling Mine Like Font of Mythos, Howling Mine is another card that gives everyone an extra card on their draw step, with a catch
Abilities that trigger when a permanent turns face up wont trigger, because even though you revealed the card, it never turned face up
MM: Designing Universes Beyond sets is an interesting challenge because it flips the worldbuilding on its head
Unlike almost every other format or game type in MTG, a planar deck such as this one can easily be copied & proxied up to play with your playgroup, as most people won't mind too much, (except maybe your local store owners) Also, due to the fact that Planeschase usually goes hand in hand with casual formats, people are also going to be more lenient, since there isn't a lot of money or worth in the plane cards themselves
See Simulacrum Synthesizer, Foundry Inspector, and Urza's Saga as across the board, great with artifacts
If you were going to build a Happily Ever After deck, how would you approach it