How to Complete Fallen Black Leaves
The first hidden quest, Fallen Black Leaves, has two prerequisite quests: Serious Search, which is a main story quest for South Vern, and the Missing Family’s Whereabouts, which you can find in Wishnel Village. Once you’ve done both, interact with Bragi’s body, which is to the south of the Collapsed Northern Ruins.
Examine Braggi’s body again, and then ride south. where you'll have to fight a few Black Knights until they drop their Code of Conduct. Read it with F5, then continue onward to the Collapsed Southern Ruins. As soon as you reach it, you’ll have to teleport back to Wishnel Village and talk to Campbell.
He’ll tell you the truth about Sorea’s husband, but she’ll be nowhere to be found when you return to her. Instead, take the east exit to find her last known location. Once you learn Sorea’s fate, the quest will complete. You’ll be rewarded with a Legendary Card Pack, which will reward you with a Legendary Card for your in-game deck, which are harder to come by than the more common cards.
How to Complete Catching the Rat, Squeak Squeak!
This quest won’t be available after you’ve completed the final quest in the South Vern questline, ‘An Invasion of Chaos’. Once you do, you’ll find a pile of eaten vegetables right next to the mailbox in Bellion Port. Ask the nearby sailor about the littering problem, he’ll suggest that the culprit is likely a rat.
You’ll have to pull rats out of the rat holes on the other side of the port, just south of the merchants. Once you’ve caught enough tails, take them back to the Sailor; his solution- finding a cat- will take you back to where you caught the rat tails, but this time go further west until you see a few benches and streetlamps. You’ll find a Spotted Cat which, after a quick hug, you can take back to the sailor to complete the quest, adding an Uncommon Card Pack to your collection. These are more common than the Legendary Card Pack, and can be used to fill out any missing cards in your collection.
How to Complete Lost Item
The last two hidden quests will take a bit more of a time commitment to finish, but the rewards are worth the effort. To start ‘Lost Item’, you’ll have to finish ‘The Kidnapped’ and ‘Lost Goblin’, both of which you can find around Wishnel Village. To start the quest, go to Rania Village and interact with the bag at the bottom of the steps that lead to the Adventurer’s Guild. Take the item to Anabel in the guild, and she’ll ask you to attach a flyer for it on the bulletin board.