MTL - Cosma Empire - ~ Drink too much

There was a Senior Brother and a Junior Sister. One of them was transmigrated to this world and had cheats while the other was the reincarnation of a Great Emperor.

Ethan Carter was a failed fantasy author who died overworked and bitter. When he wakes up in the world of his own unfinished novel, he finds himself reborn as Darius Wycliffe, a weak and arrogant noble fated to be killed by the protagonist, Lucien Ashford, the Archmage’s Disciple.But Ethan refuses to die so easily. Armed with his knowledge of the world’s secrets and a unique ability to rewrite spells, he dives into the forbidden magic he once created but never fully explored. As he grows stronger, he uncovers terrifying truths about the world he thought he knew.To survive, Ethan must defy destiny, master the deadliest of magics, and challenge the very hero he once wrote to be unbeatable. But what happens when the lines between hero and villain start to blur?

[Ding!][Cashback System Activation Requirement Met!][System Binding In Progress...!][System Successfully Linked!][Spent $1,000. 10x Critical Hit. Earned $10,000. The money has been transferred to account XXX-XXX-XXX][Spent at least $1,000 on a beautiful lady. Received 1 lottery ticket. Do you want to use it?][YES][NO]Kyle was a man that has never had any luck in life and he was on the verge of ending it all after being fired from his minimum wage job due to a customer's complaint which turned out to be a lie but due to the customer being an attractive lady, no one believed Kyle.To make matters worse, he had to pay for the damages that was caused by the customer.Beautiful people, they had it easy, didn't they?This was his last step and he knew that he wouldn't see tomorrow as he searched for a river to throw himself in.He thought his mind finally broke as there was no explanation for the Cyan Screen that popped up as he clicked the [YES] button.[You have drawn Charm!][Charm: There is nothing the user can't charm his way out of or into! The universe has blessed you with charisma!]“Hahaha! I must have lost my marbles...” Kyle muttered to himself but his phone soon rang out to show that he had a notification.And to his surprise, he saw $10,000 sitting in his account and his jaw dropped.“THIS IS FOR REAL!!!”

“Hmph, my dumb big sister is in danger!” A mischievous grin spread across his face. “Hehehehe... this gives me the perfect excuse to finally use this treasure I’ve acquired but never bothered with!” He rummaged through his belongings, carefully selecting various items. “A bit of this... and this... and a dash of this.” Boom! The explosion of energy sent a ripple through the air as he laughed maniacally. “Hahaha! It’s done! Now, all I need is a compatible host for it.” Years later... “Did I overdo it?” he wondered in awe, watching as his creation wreaked havoc, conquering world after world with ease, as though stealing candies from children.