Doubling as both a threat and a removal spell, this vampire is about as good as two drops get
Sacrificing it ensures colour correction, landfall triggers, or a guaranteed hit for strategies light on basics
I personally play a minimum of 6 cards and a rough maximum of 10, with the caveat that commanders like Lord Windgrace are going to require more than commanders like Kinnan, Bonder Prodigy
Despite his heavy use as a Commander, his reduced usage outside of the Command Zone drops him to the 3rd spot on my countdown, but, again, I see all here of these as worthy of the top spot
Sephiroths Intervention probably wont see play past Limited (if its legal), but in that context, this is a decent removal spell
Battlebond was meant to evoke arena combat with strict rules, and this card really gets the point across