Thats nice, but it also puts a +1/+1 counter on any nontoken creatures that enter the battlefield under your control, and lets you draw a card when you do so
Theres lots to like here
The creature is often one with toughness of only one , letting you easily make your opponent's life total one and then just deal basic burn damage to close out the game
It has expanded in recent years to make this same offer to other players, whether they want it or not
In Golgari, it can mess with the enemy's plans in the early game, and be a great target for Innkeeper's Talent in the late game
Cards like Boartusk Liege, Raph's Bravado, Hound Tamer / Untamed Pup, Unnatural Growth or Zopandrel, Hunger Dominus are also good ways to pay off having a board full of werewolves