When there are 3 face-up "7" cards on your side of the field, draw 3 cards from your Deck. Then destroy all "7" cards. When this card is sent directly from the field to your Graveyard, increase your Life Points by 700 points.
I am not sure if this card will gain you 700 life points no matter how it is removed from the field.
I was screwing around and made a deck with only spells and traps in it. I had two 7's set on the field and then I used Gryphon's Feather Duster. I gained 1000 lifepoints from the feather duster, and 700 each from the 7's. Of course I still lost the match :)