While it normally provides the equipped creature with a +1/+1 counter whenever another creature dies if the equipped creature is a vampire, this number of counters gained this way is doubled, allowing for a single vampire to grow into a massive threat for a minimal cost.
They are unlikely to fall into the cEDH meta and, therefore, can attack you on an angle that your deck is not prepared to compete with
When I went to put a card into one of these sleeves, I dinged the lower left corner
The game-original characters aren't particularly bad either, including a somewhat crazy loli
November 16, 2022
Later in the game, the impact of this card is reduced a bit, since just one mana probably won't make that big of a difference on turn fifteen or more, but the explosive early game it can provide is impossible to ignore