This page of our Ghost of Tsushima guide has a detailed walkthrough for Blood on the Grass main quest. It is not a very long quest. The walkthrough explains when you meet Ryuzo, how to defeat the Mongol warriors and how to acquire ronin attire.
- Follow the trail of the murdered Mongols
- Examine the dropped straw hat
- Get to the campsite with Ryuzo
- Pick up Ronin Attire
Follow the trail of the murdered Mongols
You can do this mission after completing The Warrior's Code and The Tale of Sensei Ishikawa main quests. The starting location for this quest is shown in the picture - it is an attacked Mongolian convoy.
Examine the body of a Mongol lying by the burning cart. You will find more corpses on the main path - follow this "road". One of the Mongols will still be alive -you can kill him (optional).
Examine the dropped straw hat
Soon after passing all the bodies, you find a straw hat lying on the road. Examine it to trigger a cut-scene - the hero will meet one of his friends, Ryuzo.
The battle against the Mongols begins - start with a stand-off. If you have already unlocked the water stance, switch to it when fighting opponents using shields. Use a strong attack (Triangle) to expose them to further attacks. Also, keep an eye out during a duel with the stronger leader and avoid his red attacks.
Get to the campsite with Ryuzo
Get on the horse and start following Ryuzo. The choice of dialog option during this ride is not important. Along the way, the heroes come across a destroyed cart - examine it. Talk to the peasant.
Continue your journey to the allied Straw Hat Encampment.
Pick up Ronin Attire
Follow Ryuzo to a place where you can get Ronin Attire for free. It is an excellent piece of clothing for sneaking and performing stealth attacks. This attire makes you more difficult to see and it increases melee damage.
Along with the armor, you will also receive a straw hat, although this item doesn't affect Jin's statistics in any way. Soon, the quest will be over.
Rewards for completing the mission: Legend increased (xp) - a large bonus, Ronin Attire, The Tale of Ryuzo main quest unlocked.