Enchantment, 3BB (5) If you would draw a card, return a card from your graveyard to your hand instead. If you can't, you lose the game. If a card would be put into your graveyard, remove that card from the game instead.1
Illus. D. Alexander Gregory
The "if you can't" in the first ability refers to putting the card in your hand, as well as being unable to choose a card. Thus, if you cannot choose a card during resolution, you lose the game. [D'Angelo 1999/07/03]
The second ability is a replacement effect, not a triggered ability. The card never gets to the graveyard. [D'Angelo 1999/05/01]
It will replace itself being sent to the graveyard, and remove itself from the game. [D'Angelo 1999/05/01]
If more than one card is being drawn due to a single effect, apply the replacement as if the cards were being drawn one at a time. [D'Angelo 2000/04/20]