I would have asked for permission, but the OP had no username or address so \:
Durin's Folk: Skill of the Dwarves: Can be used on any Durin's Folk Mattock or Pickaxe: Increases attack Block breaking speed and gives extra looting from ores. This idea was suggested by Sleifer. Kudos to them!
Azaghâl's Memory: Increases fire resistance by 5+.
Dale: Dragonslayer: Increases damage against Dragons, Drakes, and Wyrms.
Rangers of the North: Ranger Stealth: Allows you to go invisible so long as hostile mobs are 5 blocks away.
Hobbits: Pebbles fired from slings at leaves have a 30% chance of knocking down that trees fruit, a 10% chance of knocking down a sapling, and a 60% chance of knocking down a stick.
I like the idea but I think it needs to be more general then just "Dale". Perhaps orc/elf/human modifiers that add to the race such as eg. jump height boost modifier for any elven boots. I simply suggest this so that finding a scroll thats faction specific doesnt make it useless for another faction entirely. Dragons will probably have a dragon bane. I do think it is a good idea in general though , as maxed orc armor shouldnt be the same as maxed elven armor in terms of modifiers.
I think it should be a reward of some sort, for pledging.
Like, once you pledge, the Scroll will suddenly appear in your inventory.
I'll work on some of the others, but I like the Dol Guldur one. Its not much different from thorns. Maybe like 1 second of poison? And it doesn't affect Archers, NPCs with Polearms, or (as I just added) trolls, ents, or huorns.