Select 1 face-up Level 5 or higher Dinosaur-Type monster on your side of the field to activate this card. Select and return to the owner's hand(s) up to 2 monsters that are either lower Level than the selected monster or face-down on your opponent's side of the field.
Tail Swipe, a card that is, IMO, one of the best Dino support cards in the game. Fist off, you need to have a LV5+ Dino on the field. It shouldn't be too hard if you build your deck right, using Big Evo. Pill and Mausoleum. Then you can clear your opponent's field pretty much. Even though it goes to your hand, why stop there? Seeing how MANY of the Dino based cards use Bounce, you can add fun to it and discard them via Card Destruction, or what-not.
Although the cost is semi-situational, It's well worth the use.
P.S., Requiem, How did you get to post the picture on the thread, and not as a link?