Thank you for your interest, I attempted to learn how to play years ago and just couldn't wrap my head around it. These cards have been sitting in the box in my closet ever since. I will be posting more in a week or two. I don't really know much about the rarity of the cards I do know on the bottom where the trade mark is it says 29/90. I am not sure what that means.
the 29/90 is just to show what # card it is in the set...this particular set has 90 cards total and Sengir Vampire is the 29th card in the set, hope i helped out!! oh and is there any chance you'll post some lots of cards?