These were just guesses on his part, and it could very well take more than that. But what mattered most to him now were what changes would occur in the future.
Half a day later, he opened his eyes with a confident light.
Indeed, the changes that would occur in the future should have already occurred, otherwise the Silver and Golden Tablets wouldn't have been missing already.
But that wasn't why he had meditated for half a day, he had already concluded that in the first couple of minutes. Instead, he was confirming something else.
He was certain. He could use Timeless Events to change the future. This might be the key to reviving his father. If he played his cards correctly, he could most definitely change those events, of that he was certain. Whatever the rest of the details were, he didn't care.