Constructs fit naturally into artifact decks
Buy the box if you value the opening experience, sealed collecting, and multiple chase lanes
While its never a given that they will be, there are a few reasons why they often aren't
Search for Blex filters your library, or you can just use it to mill yourself at a rate of five cards for 4 mana
There are even more frames some for promotional cards, other for supplemental products or even just for making fun of themselves, but I think this is a pretty good compilation of the actual state (and growing confusion) of the graphic design of Magics card frames I hope this could show not only the pitfalls designers of Magic, the Gathering should try to avoid, but all the difficulty that goes around creating a consistent design system for one of the most complex card games in history.
That said, since you have to discard the card at your next upkeep, it means that if you play it turn 2 you will need a madness card for 2 or less mana to be able to play it