Orphan of Kos is the final boss fight in the DLC and is simply the toughest fight in the entire game, at the very end of the Fishing Hamlet on the beach is where you will face off against the Great One
You’ll need to be seriously levelled (150+) have a full stock of blood vials, Kos doesn’t really have a weakness to any specific element, so your best bet is to bring a fast weapon like the Rakuyo or the Saw Cleaver and keep yourself as agile as can be
In Kos’ first phase he is incredibly fast, has some very powerful combos and will close range on you in a heartbeat, try and stick to his left side wherever possible, this might take you a good few attempts to get used to the fight
The big problem with Kos is it’s very hard to telegraph his attacks, he can feint one strike then land a devastating combo exactly where you dodge to
Stamina management is more important than ever here, if you can’t dodge, you’ll be straight back to the Hunter’s Dream, when you have Kos down to 50% health, he will then bite his weapon, get a lot stronger, hit a lot harder and employ a lot of charged nova style lightning blasts, these can be avoided thankfully by sprinting left or right. Unfortunately, giving Kos’ sporadic attacks, there’s no definitive strategy, if you’re dying consistently, I recommend going off and significantly levelling your character then coming back to have another go at him
Once you’ve defeated Kos, your Trophy will unlock