Well the description says it all simply use this card as a take away life points free card. There really isn't much to say the effect says it all.
Strategies and game play:
Try to hold onto this card till later in the duel when your opponent has inevidably sent a card or two in the grave yard. The number varies depending upon life points in terms of effectiveness. But Either way you want at LEAST 10 cards if not more in your opponent's graveyard. And always allow for your opponent to do the sacrifice one to draw one routine. Lets face it it will help you in the long run.
Combos with other cards:
Use cards that send cards to your opponent's graveyard. Monsters such as Iron Chain Dragon, Vampire lord, vampire lady are useful with this card. Another good card to use would be card destruction. Black hole and lightning vortex can also aid this card just remember to keep this card off the field when you use black hole. Grave keeper's servant is a must have with this card. So basically go for cards that up your opponent's graveyard count. Remember that 100 will add up.
Ways to counteract it:
You could just keep your graveyard count low. But in duels thats asking for the impossible. A simple trap Jammer will do the trick though.
This card can be a devistating blow to your opponent when use correctly. I've actually creamed opponents with this card alone. It has no price to pay and no downside. Its basically a cheep shot type card.
100 points per card means you have to wait to use this card. If you use it too soon you will not be able to inflict damage on your opponent. If you do it too late well your opponent has creamed you. And sometimes your opponent doesn't get very many cards in his or her graveyard for the entire duel. And nothing is more taunting then seeing a card that you can't use now but you can wait to use in your hand.
Artwork and aesthetics:
The artwork is ok. its an explosion in the cemetary which kind of suits this card. It looks devistating and kind of scary.
The rating of this card depends. If you use it too soon then its a 4/10. This card is useless in the beginning of the duel and wont take alot of life points. If you wait till later and be patient then its a 9/10 because a card that can take away 1000 lps with no draw backs has to be useful.