Erestor is the kind of hero that completly changes the way you play the game. He essentially solves card draw all by himself, but at a steep cost: you can no longer save a card for later rounds. Perfect for explosive starts and to never run out of fuel, but restrictive in what you can do. Your deck will need to be built around him. Will of the West is appreciated against certain scenarios, and he naturally synergies with any deck based on playing lots of low cost cards: outlands, Forth, The Three Hunters!, (MotK) Faramir, you name it.

He is also a great fellowship player: by drawing so many cards so fast and not being bothered by redundancy, erestor is amazing at quickly finding important uniques: Glorfindel's Light of Valinor and Asfaloth, Gandalf's Staff, Wizard Pipe, Narya and Shadowfax, Elrond's Vilya, Nenya and Mirror of Galadriel, Boromir's Steward of Gondor, Gondorian Fire and Blood of Númenor, Saruman's Staff, Elladan or Grimbeorn the Old's Orcrist, Lembas for everyone, and the list goes on and on. He is basically Santa.

Great if you want to mix things up, move away from the traditional deck building style, and create interesting and fresh gameplay decisions every round

10/10 would discard my hand again

I absolutely love cards like this, and the design of this hero (and of course many others in this wonderful game) is part of what is so appealing about this game, and gives it the longevity that it has in the community. This hero completely changes how you build and deploy a deck, and that is awesome. And for just 10 threat, with a solid grouping of stats and a very unique ability, I think there's a lot of potential for this hero in a variety of decks. Sorta feels like there might be some synergy with Círdan the Shipwright and of course many, many other heroes and cards, but I'll leave that for someone more qualified to figure out.