One quest udpdate per successful harvest, regardless of output. This is not for 50 "raws", but 50 harvests meaning you'll need to fully harvest 17 nodes. However, node type does not matter and you actually get to keep the "raws" you get. If you have bountiful harvest, both harvests count seperately. So a bountiful harvest equals 2 harvests.
Return to the Grandmaster.
Make a level 20 recipe item from a list to pristine / apprentice IV level. Suggested options are listed below.
It is recommended that persons starting this quest Examine the content of the Advanced volumes offered as rewards and their average price and availability on the Broker. In particular, volumes at the high end of the Tier tend to be rarer, more expensive and contain key recipes, such as some imbued chest armour pieces. Likewise certain volumes are disproportionately valuable when obtained early, such as Tailor volumes with the recipes for Mastercrafted Hex Dolls (which can be equipped by characters at the very first level of each Tier), or those with certain Mastercrafted poisons.