Once cast (or if you just need it), this can be cast as a generally under-curve creaturehaving only two instants/sorceries/adventures in the graveyard makes this fine on-rate, and it just gets better from there, acting like a Bedlam Reveler
Building up a groundswell of smaller vampires will likely turn nasty the second they can be converted into tricky-to-block demons
Building the deck by buying singles gives you two advantages
There are also some number of quality utility lands that involve sacrificing that make this card even better: favorite Mirrorpool springs to mind, but theres also Buried Ruin, Command Beacon, Inventors Fair, Urzas Saga, and if youre a degenerate Strip Mine
For now, though, there's always Commander - home to many tribal archetypes
Deflecting Swat Theres an argument that Fierce Guardianship is the best of the Commander free spell cycle, but its ultimately a free counterspell, of which there are plenty to choose from