Now, we give our character blue eyes and make her a mary sue :) Now she's immortal and is the prettiest she cat ever! He also has a tragic backstory where her brother died four weeks after birth. He was carried off by a hawk! And her father died from a hmm..... a badger! Totally original death! :0. Now lets give her pampering! Action!
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Silverkit mourned the death of her brother still. He had died two moons ago but. She still missed him dearly! She cried herslef to sleep that night (Because cats cry. Yep). She awoke in starclan to face the legendary Moonstar! As if her brother and father never exsisted she screamed," OH MY STARCLAN! IT'S THE REAL MOONSTAR! OH MER GURD!". Moonstar rolled her eyes sassly.

"Listen im going to give you an important prophcey because medicine cats clearly arn't needed!". Silverkit gasped," A prophecy!? Do I have to dilver it to Firestar!?"." Shh, just listen, The Silver cat with a gift of beauty will hold unlimited power! Only she can destroy the Badger's savage claws who threaten the clans". The dream began to fade. Silverkit screamed " Wait! What dose it mean!?".
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Okay first of all don't always Give your charcter a tragic past. Or abusive parents (not seen here but is exsample). Make it up. Even if its silly atleast its original. Secound 98% of the time prologues start in starclan or a she cat giving birth. How about fleeing from an enemy or a foreshadow? Don't always make the prolgue in starclan! Finally if its nessesary to have the prologue in starclan don't reval the propchey right away! If that ts not possible don't have the cat fade away mysteriously!

Oh no! Im loosing cell cervice in starclan! I can't tell you....*fades away dramatically*

Finally take time to make the prophecy! Don't rush it and make it so obvious that the character looks stupid. Or maybe make it seem like its about the main charchter and PLOT TWIST! It's not and the clan thought they would be saved by them! A good plot! Good luck and write on!

~DjJoyheart