Falkenrath Pit Fighter R
Creature - Vampire Warrior (Rare) 1R, Discard a card, Sacrifice a Vampire: Draw two cards. Activate only if an opponent has lost life this turn. In the arena, vampires leave aside the façade of honor and civility an fight like the predators that they know they are.
For a loss of menace and a rarity boost, you get a repeatable Insolent Neonate effect for when you need card draw to supplement your unrelenting Vampire aggro. The life loss clause might not matter too much since you're always attacking anyways.
People seem to over-read that its ANY vampire, not just this one itself.
So its pretty busted for the late-game if you have a lot of vampire tokens to fuel the card draw.
The entire "discard" part to draw into more cards would fit the old vampires with lots of madness more, but thats pretty much the point of the card, to make some wacky combo with all the cheap vampires.
Being a 2/1 for R is just ensuring that this sees play, if the ability is anywhere relevant.