Graveyard king

[Addy191]

Where can i find grave yard king plz help me....

[rijackson741]

South of Gauward's house, on the river

[Addy191]

South of Gauward's house, on the river

Where is that ?

[Nut]

Look at the worldmap around Loneford and try to fill the gaps

[ace]

also

be prepared for a tough fight, very prepared

[Kashim]

Echo that "tough fight". I can't say I wasn't warned, but HOLY COW.
Remember how prepared you had to get to fight the Hira Zinn?
Get 3x more prepared than that. Take Lodar's best potions. Take any potions you can get from anywhere. I was level 38 (turned 39 mid-battle) and it was BRUTAL.
On a side note: I can't figure out if a defensive build or an offensive build would work best for that fight. I suffered through it with a defensive build, DR 12 soaking up most of the damage.
side note 2: My phone started lagging SO BADLY in there, and also had serious problems in the other new cave nearby. I think the mobbing monsters are causing some pretty serious performance problems. I have a Note5; I shouldn't be hurting for processing.

Tips:

Preparing:
I seriously took every potion I could find. AP boosting potions are particularly effective, because they get you back to where you started. Tears of the Shadow are very highly recommended for the boss. I used tears, liquid courage, speed and haste, and still had issues with him knocking me to -1ap per round.
I did it with a defensive build, but I can see the potential to power through offensively. They are NOT immune to critical hits, so while a character with brutal clubs might have a hard time getting a swing, you'll also likely level one per swing, and might be able to take out the boss in one round
BC is your best friend. If they can't hit you, they can't putrify you as much.
Low AP cost weapons are preferable, as you'll be less likely to have rounds where you can't swing at all.
Dropping your AP requirements to flee is a good idea. you can back off of the entrance over to the other map waiting for putrefy to end. If you can drop down to 1 or 2 (maxing it) it'll let you run when you have no other options.

The inital fight:
Back yourself into a corner, if you get more than about 4 on you, you are done for, because they'll basically stun-lock you. Try to find a place where you can fight them 2 at a time. That will keep them coming at you without letting any more spawn. If there is a risk, do not end the fight until you've pulled more to you, or the graveyard is empty. It seems like their respawn rate is really high, but it might just be the number of them trying to respawn at one time.

if minions come up behind you during the boss fight, if the boss is still healthy, swing around and take care of the minions. If the boss is super low, you may want to rush it for the end. If you end up fighting 3 zombies and the boss, they'll just stun-lock you until you are dead.
The boss is going to stun-lock you sometimes. There's just not a lot you can do about it. You have to be able to take some serious punishment from him, and by "serious punishment" I mean "have him hammer on you for 5 rounds while he locks you at -2AP so you can do literally nothing.

[Zukero]

For your performance issues, disable the "High quality filters" in the preferences.
It doesn't really depend on your hardwares power, but occurs on some devices. I'd say it is caused by an inefficient implementation of the API we use by some vendors.

[ace]

Kashim explained the tough fight with graveyard king very well. here, hit and run tactics will never work so you can't clear this boss at low levels XD.

[Firefly84]

I even had trouble with the boss with level 111 and two ROLSs and ROLs.
I managed to escape once to heal up and then I proceeded with more caution.

[Kashim]

Re: Zukero: Thanks, I'll do that. Also, whoever is responsible for this fight, extreme kudos. It was a blast trying to work through how to handle it. It completely invalidated two of my hardest hitting builds: the "DR is king" build was a LOT less effective than I'd thought (because I could take the hits, but took forever to clear such a huge mob), and the 2 ROL build got laughed at since it couldn't block worth a dang, and couldn't regen health.
Honestly, the whole patch is amazing so far.