Path of Need might be my favourite attachment in the game, if not player card in general too. It's pricey but there are ways around that like Vilya, Bartering, or any slew of the resource-generating cards within the Leadership sphere to help pay for it.
This card is a solid card that can change your game and save the day when things are at its darkest. I used it in my solo Treebeard/Elrond/Gandalf deck that I took through the Sagas and it was the MVP for me. I combined it with the deck-scrying of Henmarth Riversong to know just how much to quest to break even and keep the active location in play, and then I had had three of the strongest heroes in the game able to defend and attack at will without exhausting. One of the most memorable battles involved Treebeard using his 3 Defense and 8 attack to defend with burning brand and then utterly destroy a horde of 7 Haradrim in Journey to the Crossroads. And another, and perhaps the strongest use of the card is using PoN in Helm's Deep where you quest hard to keep the locations in play, and again, having the strongest heroes in the game be able to fight without exhausting in that brutal quest was amazing.
With the addition of Reforged this card has new life breathed into it and I highly recommend it to everyone to try at least once. In an Elrond Vilya deck this card definitely has a forever spot locked in.