Hearthpwn

Idea

The idea is to equip Eaglehorn Bow early (try Mulligan for it), use Steady Shot as much as you can, remove key minions (see tips) with spells and use secrets to keep your Eaglehorn Bow up. Try to always go face with Eaglehorn Bow.

Replacements

I highly recommend not to replace any secrets (it's most important part of the deck). Other spells you can replace for damage-dealing spells or just any cheap spells (so it can be used to deactivate Counterspell). Don't ever use minions in this deck.

Best replacements: Powershot, Cobra Shot, Hidden Cache and Call Pet.

Worse, but viable replacements: Tracking, Smuggler's Crate, Lock and Load or Stampede.

Enemy Deck

Let's talk about Noth's deck. The important things in his deck are secrets and weapon-destroying minion.

Secrets

You should always play around his secrets. He has Counterspell x2, Duplicate x2, Ice Block x1. In most situations, I would recommend to use cheap damage spell to check for Counterspell, then use Flare to destroy his secret if needed. If you can't destroy or check secret, always assume that it's Duplicate. Keep in mind that Counterspell will successfully counter Flare, that's why I recommend to check/bait for Counterspell before using Flare against other secrets.

Don't let him duplicate Necroknight, Skeletal Smith and Spectral Knight at all cost! In most situations duplicating them early would mean defeat. Try to trigger Duplicate on any other minion or let Noth trigger your Freezing Trap or Explosive Trap - don't forget, his secrets aren't working on his turn! Also try to avoid duplicating Flesheating Ghoul, sometimes it was game losing for me, but it's much better than other 3 cards.

And here is my recommendations for spells to check for Counterspell: Arcane Shot > Toxic Arrow > Grievous Bite > Quick Shot (early game, in late game it's great drawing tool) = Hunter's Mark > Multi-Shot = Kill Command > Quick Shot (late game) > Explosive Shot.

Skeletal Smith

And the other problem is Skeletal Smith x2. It will destroy your Eaglehorn Bow, so you should play around it. The basic idea is to try let Noth trigger Freezing Trap with Smith to win time, kill both of Smiths at the same turn or restart if he removed your second bow too early (I would say if Noth has 15-20+ HP).

Tips

1. Try to avoid wasting too many spells on minions with 1-2 HP and Acolyte of Pain. You can deal with them with mass spells (Grievous Bite, Explosive Shot) and most importantly - Explosive Trap;
2. Focus Abomination, Necroknight and Unstable Ghoul as desk cleaners for low HP minions;
3. To deal with Spectral Knight I recommend Deadly Shot or using adjacent Necroknight if able. You can also use Grievous Bite, Explosive Shot, Misdirection, previous tip or Freezing Trap (to win some time);
4. Never swap Eaglehorn Bow for another and never destroy it by using on last durability;
5. Don't hesitate to restart if you didn't get Eaglehorn Bow on third turn. My personal experience shows that waiting for bow any turn after 3-4 would result in defeat, so don't waste too much time.

I would probably not update this guide later, so take it for what it worth. Upvote if my guide helped you.

Good luck, have fun and enjoy! :)