The Underworld Cookbook needs four mana and to sacrifice itself to recur the creature, but as an artifact has many ways to be recurred itself
Magic: The Gathering Arena will appeal to veteran Magic players looking for a more comfortable and convenient space to ply their trade, but also CCG players who are after more challenge and complexity than digital card games like Hearthstone, The Elder Scrolls: Legends, and Gwent can offer
This is mostly because Skysovereign has developed into an odd Pioneer staple thanks to Karn, the Great Creator tutoring it from sideboards in Mono-Green Devotion and Greasefang, Okiba Boss decks using it as a secondary payoff alongside Parhelion II
X and Pokmon Legend are treated as printed
Vampire deck is too broad of an idea to know how to build
You'll notice that several commanders for the tribe are not Beasts themselves