Ruby is powerful, and Emerald is great for gaining lore early on
When magic first started, Wizards was a far smaller company and pulled ideas for sets from history or, in the case of Arabian Nights, a book (One Thousand and One Nights), which gave way to cards like Ali Baba
Nice pair
Recursive effects use the graveyard as a resource, but there are plenty of combo outlets and ways to turn your graveyard into additional value
If were willing to pay a higher upfront casting cost, we can start to discount and abuse some extremely powerful abilities Twinning Staff, Helvault, Orthion, Hero of Lavabrink, or Tower of Fortunes
Thanks to how much card draw there is in both Blue and Black, this is a fairly viable win condition