Subjugate the Hobbits is a pretty massive and game-ending spell, and I also like it because it represents the Scouring of the Shire, a very interesting and important part of the books that the movies left out
Sure, your Consecrated Sphinx is good to resolve, but before my turn, for the price of one blue mana and an expendable creature, let me get my own straight to the field with Mask of the Mimic as well
One of the most played cards in EDH
Bonus points if the cards are relevant in multiple formats, such as Standard, Pioneer, Modern, Legacy and Commander, as this will help maintain long-term value
They certainly belong on a list of best Gruul cards, but the lands and mana rocks are simply necessities that Id rather just give a mention and move on
I love playing them in my decks in real life and I wish I could use them digitally, too