Sylpher the Sky Dragon Effect: This monster requires three tributes to summon (treated as a special summon). This monster's Attack and Defense are each equal to 1000 times the number of cards in your hand. While this card is on the field, if your opponent Summons (or Flip Summons) a monster with a Defense of 2000 or less, destroy that monster. This card cannot be targeted by Magic, Trap, or Monster Effects. if you have 5 cards in your hand Sylpher, it'll be 5000/5000. If you play three cards, next turn (after drawing a card) it becomes 3000/3000. So it doesn't remain constant (unfortunately). Kinda like Muka Muka, only 10/3 times more powerful. And it has that awesome effect that essentially destroys all level 4 monsters your opponent plays
Obelisk the Tormentor Effect: This monster requires three tributes to summon (treated as a Special Summon). Tribute two monsters: When this monster attacks during this turn, it attacks all of your opponent's monsters at the same time and does 4000 points of direct damage to your opponent's life points. sacraficen 2 mansters and add ther atc and def to Obelisk the Tormentor. This card cannot be targeted by Magic, Trap, or Monster Effects. Look at what this means. It's almost IMPOSSIBLE to have a monster with ATK or DEF higher than 4000, so the attacking all monsters essentially allows it to destroy all of your opponent's monsters. Then there's the 4000 points of direct damage. And since activating Obelisk's effect doesn't count as attacking, Obelisk can also attack normally
The winged dragon of Ra Effects: This monster requires three tributes to summon (treated as a special summon). This monster's Attack and Defense are each equal to the sum of the base Attack and Defense of the three monsters that were tribute to summon this monster, respectively. Cut your life points in half in order to destroy an enemy monster on the field. Reduce your life points to one in order to destroy all enemy monsters on the field. Winged Dragon of Ra's ATK points are increased by the amount of life points you lost in this fashion. This is truly a magnificent card. Ra is also not effected by monster effects and magic, trap cards. In the case that ra is destroyed you will receive his atc power as your life points.