Okay, this took longer than I thought.  Thanks to everyone who helped me out with the rules of Duel Monsters, I could never have written this on my own!  All cards used in this duel are my own creations.

Chapter 25: Of Beasts and Guardians

            "You go first," said the figure.

            "Alright," said Serenity.  "I'll play one card facedown and summon Terra, the Earth Guardian, in attack mode."

            A tall, bright green warrior took the field, readying its staff for battle.  It had 1600 attack points and 2000 defense points.

            "And now it's my turn," said the cloaked figure.  "I play Griffin, the Winged Beast, in defense mode."

            The purple monster materialized on the opposite side of the field, with 1400 attack points and 1800 defense points.

            Hmm, thought Serenity.  I can't attack it or I'll lose life points . . . but if I use this magic card to upgrade my monster, I can destroy that Winged Beast!

            "I play Green Thumb," said Serenity.  "Green Thumb boosts Terra's attack strength by four hundred points!  Terra now has 2000 attack points, which is more than enough to defeat your Winged Beast!  Unfortunately, I can't attack on the same turn as Green Thumb is played.  But next turn, you'd better watch out!"

            "I don't think your Earth Guardian will be around long enough for it to matter," chuckled the figure.  "I place one card facedown, and switch Griffin from defense mode to attack mode!"

            "That's what you think," replied Serenity.  "Go, Terra, destroy Griffin now!"

            The Earth Guardian charged at the Winged Beast with its staff raised, ready to shoot a ball of energy at Griffin.

            "Not so fast!" said the figure suddenly.  "By switching my Griffin from defense to attack mode, I activated its special ability!  The beating of its wings created a spinning tornado that destroys everything in its path!  Ha ha ha ha!"

            "Oh no!" said Joey.  "Serenity's gonna lose her Earth Guardian!"

            "Relax," said Seto.  "Serenity wouldn't leave herself open to an attack like that."

            Joey looked at Seto curiously.  How would he know? wondered Joey.

            The tornado gathered speed as it headed for the Earth Guardian.  But Serenity was ready for it.

            "I activate my trap card," she declared.  "Forest Shield, stop that tornado!"

            A giant wooden shield covered in glowing symbols took its place in front of the Earth Guardian.  The tornado disintegrated upon making contact with the shield.

            "Your tornado is gone," said Serenity.  "And now, Terra, destroy that Griffin!'

            Terra shot a bolt of vivid green energy from his staff, hitting Griffin square in the chest.  Griffin's image shattered like glass and disappeared.  At the same time, the cloaked figure's life points dropped to 1800.

            "All right, Serenity!" encouraged Joey.  "Great job!"

            Serenity smiled and gave her brother the thumbs-up sign. 

            "Don't celebrate yet!" the figure sneered.  "This duel has only just begun!"

            Yeah, yeah, I know.  Corny ending line.  Don't they use it in most Yu-gi-oh! duels?  Oh well.  Please review!