A powerful secret
Our story starts in Salazar's house which he shares with his girlfriend Nagini.
Nagini asked, "Does whatever is in there make us live forever?"
Salazar smiled. "It does."
Nagini insisted, "Let me see it then, Sal."
Salazar unwrapped the dirty cloth to reveal a shimmering rainbow coloured gem.
He told her, "I call it the Invincibility Gem."
Nagini gasped. "It's breathtaking."
Salazar said, "I found it on my travels through the world last month, in Scotland of all places."
Nagini smirked. "You're telling me that you found this treasure in Scotland?"
Salazar nodded and recounted, "I was strolling through the hills by Hogwarts when I found it lying on the ground. My curiosity got the better of me in the end and I picked it up, and unwrapped it. As soon as I touched it, I knew that it held great power. It spoke to me, in fact. It said, 'Salazar Slytherin, I can give you and one other long life. If you share my power with a third party, I shall never work for you again. Use me wisely.' After it spoke, I just knew that what it said was true. So, I never spoke of it to another soul until now."
Nagini glanced at the gem and inquired, "How does it work?"
Salazar explained, "You just have to keep it in a glass case which is protected with the most powerful enchantments."
Nagini beamed, "This is wonderful news, my dear Sal. You and I will live forever."
Salazar stated, "Yes, but remember the gem's words. You can never tell anyone else about it, or it will never work for us again."
Nagini promised, "I will never tell another soul. It's not like I have many people I would tell anyway."
Salazar grinned. "Excellent. We shall never die, and nobody shall ever discover the gem's secret, Gini."