Alright, got requested to make a HT prequest guide aswell :D so here goes
Go far far in leafre to "Cave of life"
Talk to Moira (guy in the cage) About making a "Secret medicine for transformation"
Then he tells you to collect the following:
1 Cornian's Marrow
1 Skull shoulder pad
1 Manon Cry
10 Tough Dragon Skin
1 Cornian's Dagger
I usally do it in the following order
I walk back 5 maps to "Wyvern Canyon" and kill Wyverns to get the "Though Dragon Skin"
Then i use Town Scroll, go to the "Black Cab" go 1 Map > then enter the hidden teleport in the bottom right corner
There i kill Dark Cornian's collect "Skull Shoulder Pad", "Cornian's Marrow", and a "Busted Dagger"
Then use Town Scroll, Talk to Mos (hes up right from where you come in leafre) To make "Cornian's Dagger"
To make it you need 1 Mithril Plate and 1 Steel Plate.
And now it's time for Manon's Cry, i recomend you to make a party of 3 since manon drops 3 crys, so you can search channels faster
and when manon is found you kill and everyone can loot a "Manon's cry"
Now you have all the items needed NOTE: DO NOT GO BACK TO MOIRA AND COMPLETE THE QUEST!
You need to have all the materials ready for when we are going to do the Actual run.