Newest draft (1/11):Zadok finds the world in chaos. The town feels emptier after humans are kidnapped and massacred. Magical creatures who rebel are captured and tortured. And Zadok – one of the best warriors – lost all of his memories. (This feels too choppy imo and not really successful as a hook. I would try something like: When Zadok's town is raided by rebelling magical creature, something happened and Zadok – one of the best warriors – lost all of his memories. but in your words.)When Zadok leaves his hideout, he finds out that Kasen – the leader of the enemy’s army – wants humans extinct. He was told that Kasen took his memories too.(part of this sentence feels like a repeat of the previous sentence.) But he has to cross past war lines if he wants even some of those memories back.Zadok is conflicted about fighting in the war even after seeing water spirits get tortured and oppressed; he’d rather get his memories back. He doesn’t think a boy (boy? how old is he?) with no memories could be helpful.But when he gets some of his memories back with the help of some (repeat) magical creatures, he realizes the life he has been living is a lie. The more he discovers, the more his spark to end this war turns into a flame. He’s not sure if he can stop the war, but he wants to stop Kasen. (I think you're on the right track with this ending, but as it reads now, it's pretty vague. But when some magical creatures help Zadok regain parts of his memory, he realize the life he's been living is a lie. That like ignites a yearning to put an end to the war or at least stop Kassen from.... I'd do something like this for a closing, but again, in your own words.)
Thanks for the critique, hope this helps!