After obtaining the flower, head to the left.
Defeat the enemies ahead. There's a treasure chest on the left containing materials.
There's an item at the edge of the cliff ahead.
Now turn back and return to where you obtained the Memory Flower, then grapple up the tree.
Once you're up, heading left leads to a Dragon Pillar, while the right is the main path. You can go left first to save your progress. There are quite a few enemies to defeat on the left.
We can take on the second Dragon Pillar first. This "Gold Mask Man in Black" is noticeably weaker than the first time, as we've grown much stronger. He only has a few new moves compared to before, which are listed below.
Special Attack: When he crouches and his body glows red, wait about half a second, then dodge immediately. Don't let your guard down after dodging the first hit; there will be a second one after another half-second delay.
Black Light Attack 1: He didn't use Black Light attacks during your first encounter, but he will now. The first strike is a horizontal slash, followed by a leap and a downward Black Light slam.
Black Light Attack 2: He performs an obvious leg-lift charge-up. You should be able to react easily.
His other attacks are no different from the first encounter. After defeating him, you'll obtain the survival accessory "Magic Scabbard".

