We need the Anthem cards to make our Vampires big enough to be a threat, and we need free sacrifice outlets, like Viscera SeerViscera Seer and Bartolom del PresidioBartolom del Presidio, to kill the small Vamps so they become big Demons, whether our opponents block or not
Tapping and drawing a card has massive value, and even when that trick isn't needed, you can essentially "cycle" the card
An old ability that initially debuted in Ice Age, cards with Cumulative Upkeep require their controllers to pay increasing upkeep costs every turn or sacrifice them
In conjunction with Kill Switch, that means you can keep all other creatures tapped permanently, freeing you up to attack with impunity (provided nothing with haste comes at you)
Amazon also carries a variety of Pokemon cards from reputable sellers, but due to the commingling of Fulfilled by Amazon (FBA) inventory, there is a significantly higher risk of receiving inauthentic products