Enchantment, 2WW (4) Play with your hand revealed. If you would draw a card, reveal the top card of your library instead. If it's a creature card, put it into your graveyard. Otherwise, draw a card. Whenever a creature is put into your graveyard from play, return it to your hand.1
Illus. Harold McNeill
Token creatures are removed from the game if they leave play, so this effect will not let you get them in your hand. [D'Angelo 1994/06/08]
The "draw a creature" ability is a replacement effect (see Rule 419). [D'Angelo 2000/03/09]
You can use Resurrection or Safe Haven to get creatures into play. [D'Angelo 1995/06/14] This is because the creatures come to your hand or into play in some way that is not considered a "draw". Enduring Renewal only affects creatures that are "drawn".
If you Animate Dead a creature and then the Animate is removed, the creature goes to your hand. [D'Angelo 1995/06/14]
If the creature is only a creature due to an effect, it still comes to your hand. [Duelist Magazine #7, Page 9] This includes Mishra's Factory, Titania's Song, and any other way to animate a card.
The triggered ability that returns the creature card to your hand fails to do so if the creature is no longer there when the ability resolves. [D'Angelo 2006/08/01]