For starters, Omo, Queen of Vesuva is a 1/5 Creature that can be cast for two generic mana and either a blue or green mana
Currently, the card topping the pricing charts is The Tenth Doctor and its not even close
Its why they dont like buyback or retrace: knowing the opponent is just going to slap down another slightly beefy creature and cast Rancor again in the next turn cycle makes your Murder feel a little worthless
Of course, if you can pair this card with any number of red mana-ramping spells (a la Seething Song or Battle Hymn) and one-mana cantrips (like Might of the Meek, Ancestral Anger and the like), it truly sings, and it pairs beautifully with many other cards on this list
It gives you that effect on a burn damage Enchantment that can keep triggering well past the EtB effect going off
Yes, Vampires are good in MTG and among the most supported and powerful tribes in the game