Silent Death is Yuna Tale 2 of 4, an Act 2 stealth tale at Mamushi Farmstead in Otsuna. You sneak in alone and assassinate the three Mamushi brothers without being seen. It rewards the Charm of Hidden Sight and 2 Silk.
Part 5 of 66 in Tales of Tsushima
Part 2 of 4 in Yuna's Tales
Meet Yuna outside the farmstead, which is walled like a small fort. It is a slave farm, and she and her brother were once held there. She cannot bring herself to go in, so Jin goes alone. The goal is to scare Altan's side with the Ghost legend, so nobody may see you and only the three brothers may die. Kill all three, then go to the front gate to meet Yuna.
Taizo is in a green tent with two guards walking nearby. Time their route and slip in. Manzo is out in the fields abusing workers; crouch through the pampas grass to reach him. Kichizo is in the big house. From Manzo's field, head toward the house and use the crawl space on the left.
Meet Yuna by the farmstead and follow her. Get inside unseen. Kill Taizo, Manzo and Kichizo. Go to the front gate. Hide in the grass to finish.
Wear the Ghost Armor if you have it, or the Ronin Attire if not, as both help you stay hidden. Use Focus Hearing a lot. You can enter by jumping on the rocks and over the fence into the grass. At the end Yuna names the man who supplied every slave on the farm: the Black Wolf.
Message in Blood
Message in Blood is Yuna Tale 4 of 4, the Act 2 finale of her storyline. After Altan strikes back at Ichi's Inn, you ride to his camp near the Kushi border and duel him. It rewards the Charm of Swift Return and 2 Silk.
The Black Wolf
The Black Wolf is Yuna Tale 3 of 4, an Act 2 side tale at Yoshinaka Bay in Otsuna. You and Yuna hunt the slaver who sold her as a child, clearing a coastal camp and then a Mongol ship. It rewards the Charm of Shadows and 2 Silk.
The Tale of Yuna
The Tale of Yuna is Yuna Tale 1 of 4, the Act 2 side tale that opens her storyline in Otsuna. You clear Mongols out of an inn run by Yuna's childhood friend Ichi and learn how to draw out the warlord Altan. It needs A New Horizon done and rewards the Charm of Rejuvenation and 2 Silk.
For Tsushima
For Tsushima is an Azamo side tale where you ride with a fighting woman from Ariake to find the Azamo League, a band of farmers and fishermen resisting the Mongols. It is two fights alongside her, and pays a Charm of Hidden Sight.