When Discord learns about his past from the royal sisters, they can't help but wonder how he'll fair or if he'll decide to go after Tirek just the same. If he does decide to go after a banished Tirek, he risks being banished himself. Alas, that's a risk he's willing to take.
Not to be a party pooper, but I'm pretty sure Discord would know about his own past.
Also, having chapters that are like 300 words long on average is generally a pretty bad idea.
Whoa, I hate this story lol