Whether or not a cycle of basics is worth $30 is between you and your conscience
It lets you make an opponent draw and lose life equal to their graveyards sizeoften enough to finish someone off instantly
Miscalculation would either trade fairly evenly, be used on something of low significance simply to get it used before it was dead or get instantly cycled
If you pay 2 mana and tap the artifact, it can then be sacrificed to allow players to search their library for a basic land card and put it onto the battlefield tapped
Or you can use multiple discard effects to spread the love around a fleet of creatures, kind of like Balmor, Battlemage Captain, except you get to draw cards
Sengir Vampire is the first Vampire in MTG , appearing in the very first set, Alpha