Your options for this include the likes of Into the Inklands own Little John, Robins Pal and older card Little John, Loyal Friend
Criteria: Non-artifact (yes, I'm that sick of the botthe bot) Golgari creatures with the ability to draw cards or grab cards off the top of the deck or from your graveyard, either by allowing you to play them or by putting them in your hand, without an additional mana cost
If the copied creature is copying something else, then the token enters the battlefield as whatever that creature copied, with the exception noted above
It also scales up very nicely into Commander, especially if you enjoy playing graveyard decks and need a way to protect your yard from exile effects
However, they certainly keep things fresh by integrating a wealth of new and established mechanics into each and every card
A fantastic card