The game boasts such a complicated rule system that it's been officially declared the "most complex game in the world," and every new set can bring players to any number of new, strange worlds
There are plenty of combos that use Sensei's Divining Top, a cost reducer, and a way to play it off the top of your library, like Mystic Forge to draw your entire deck and rack up a near-infinite storm count
The options and lower cost that glimmers in Sapphire bring to the table make it a great complement to the slower moving, yet powerful cards in Ruby making them a tempting choice to pair if youre focusing on gathering Lore with lots of characters
Despite looking like a U/W deck that splashed only the tiniest bit of the other colors, The Deck would reinvent itself after sideboarding, turning into a Blood Moon deck despite having just seven basic lands, itself (and this was obviously long before fetchlands)
In addition to an unrestrained desire for power and penchant for monologuing, they also tend to present our heroes with a terrible dilemma: a set of options which all seem bad with no obvious right answer