Sawtooth Loon

Oracle Text

Flying

When Sawtooth Loon enters the battlefield, return a white or blue creature you control to its owner's hand.

When Sawtooth Loon enters the battlefield, draw two cards, then put two cards from your hand on the bottom of your library.

Card Rulings

10/4/2004 Both triggered abilities trigger at the same time so you can decide which order they go on the stack. If you have no cards in hand, you would likely choose the order where you draw and put on the library before unsummoning the creature that is on the battlefield.
10/4/2004 You choose the creature to return on resolution of the triggered ability. This is not targeted.