Pick up this item, then proceed forward. In front of the corpse lies some dust, and there's an item on the left. After collecting it, turn back.
Return to the spot where you picked up the flower. There's a door on the right that we can now open.
After entering the door, defeat a wave of enemies. Another enemy is hiding around the corner, and the last one will drop a "Killing Intent Amber Shard".
This is the fourth piece we've obtained, completing the "Killing Intent Amber" and increasing our maximum Killing Intent capacity.
