Guide of Souls is fine on its own in a humans shell, but imagine grabbing this white cleric in a Boros energy aggro deck
Donatello, the Brains is blue
This card is actually the Duty Finder
9 Captivating Vampire Captivating Vampire is a straightforward and flavorful creature that helps to double down on many goals of Vampire-Tribal decks
Aside from some minor gameplay edges from having uniquely named basics (trying to improve the odds on your Tainted Pact or hurt your opponent's potential Predict), there weren't really many reasons to actually play snow-covered lands in your deck
After the Scars of Mirrodin block introduced metalcraft, another artifact-related mechanic, the affinity decks started to add metalcraft cards like Mox Opal, Carapace Forger, Etched Champion, and Galvanic Blast