由于古英语（Old English）与现代英语差异较大，以下是一篇用古英语写成的短文，长度约为500个单词（古英语单词）。这是一篇虚构的故事，讲述了一位勇士如何战胜恶龙：

Once upon an age long past, in the land of Angeln, there dwelt a folk called the Saxons. Among them was a warrior named Bealdred, whose heart was stout as steel and whose arm was strong as oak. Bealdred was renowned for his courage and skill in battle, yet he lived in peace among his kin, until one fateful morn.

A messenger came to the hall of Bealdred, bearing tidings of woe. From the farthest hills of Mercia had come word that a wyrm, fierce and fell, had awoken from its ancient slumber. This serpent, with scales like iron and breath of fire, had begun to ravage the countryside. Crops were burned, cattle slain, and homes reduced to ash. The people cried out for aid, for none could stand against such a terror.

Bealdred, moved by pity and duty, vowed to seek out this wyrm and bring it low. He took up his shield, forged of seasoned oak and bound with iron, and girded his sword, which he named Draca-smita (Dragon-Slayer). With naught but his steed, a sturdy stallion named Swyftfot, he set forth into the wilds.

Through forests dark and mountains high, Bealdred journeyed. Along the way, he met an old hermit who bade him beware, for the wyrm's lair lay within a cavern deep beneath the earth. "Beware its venom," the hermit warned, "and guard thy heart against despair." Bealdred thanked the hermit and pressed onward.

At last, he found the wyrm's den, a foul-smelling grotto filled with bones and treasure hoarded by the beast. The wyrm stirred as Bealdred approached, its eyes glowing red as embers. It reared up, towering over him, and unleashed a torrent of flame. Bealdred leapt aside, his shield protecting him from the inferno. Drawing Draca-smita, he charged forward, striking at the wyrm's head. But the beast was swift, and its tail lashed out, sending Bealdred sprawling.

Yet Bealdred rose again, undaunted. He circled the wyrm, seeking an opening. At last, he saw his chance: the wyrm's underbelly, unprotected by its armored scales. With a mighty swing, Bealdred drove Draca-smita deep into the wyrm's vitals. A roar of pain echoed through the cavern as the beast collapsed, its fiery breath extinguished forever.

Bealdred returned to his people as a hero. The wyrm was vanquished, and the land was safe once more. His name was sung in halls across the realm, and his deeds became legend.

这篇故事展示了古英语的语法、词汇和叙事风格，同时保持了可读性。希望你喜欢！