It's a great tool to have during drafts and enables you to make better picks from your packs
Finding one of these cards ungraded in near mint condition is going to cost you
but, human tribal effects and humans were made primary and secondary themes in red and blue, respectively
Much like the Phyrexian golem, you can usually survive the first hit from Etali by just throwing some toughness in front of it, but even Blightsteel doesnt come with a mega value engine stapled to the front half of it
Ulamog, the Ceaseless Hunger and Ulamog, the Infinite Gyre have two different card names, so you can have both out simultaneously (even though they're both variants of Ulamog, lore-wise)
You could use MTGNexus, which lets you make full sets instead of individual cards, and you can even publish the set to let others view it and give you feedback