Hmmm....somethings up!!!
My party is about 36th lvl. high and I just got my butt cramped down a beerbottle and kicked all the way to the moon :D
I totally lost it against that Yaga Suhar dude...I only found ONE heart...his...I thought that was enough to beat the filthy fu#ker...but NOoooo....he just keeps on pounding me with that green stuff whirling around him.
NEED SPOIL...
How do I beat the Bhaalspawn Yaga Suhar...

Sparhawk silently cursed his looselipped young queen

spoiler...
.
.
.
.
.
.
.
you should have found 2 hearts. Yaga Sura's was in the fire pit... and the witch's heart was hidden back in Yaga's quarters. You take both hearts back to the witch. I forget what the witch does to his heart, but it makes him vulnerable again. The witch has a change of heart, summons some stuff (dryad, shambling mound, etc) and attacks you but at your level, this doesn't pose a problem. You should be able to beat Yaga now.

I beat him with a 19-20th level party (except for Jaheira, who was 13th/13th level). Tough battle, but beat it on the first try.

Question, what level of difficulty are you playing at?

I play at Core rules...
Where is his quarters?

Sparhawk reached down and picked up the sword...as he looked up he saw the giant hill tremble before him, shacking off the dust and suddenly revealing itself to be the soul and incarnation of EVIL

BUMP...Well sort of I just had a new question in realtion to Yaga fellow.
I´m looking for his quarters...to find the witch heart...but I can´t find the quarters!!!

Spoiler
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
Have u kicked the gorions ilusion "some deamon dont remember hes name"
if u continue up ill meat yags mom and she will tell u some things.
And the other heart is at the same place as the first but in the firinging pit or in the next room. There are some door at the sides that u can open...

SPOILER..
.
.
.
.
.
I am assuming you met the witch (his mother) first. She talks to you, updating your map and telling you to get his heart, and hers. Then you goto Yaga’s stronghold. The entrance to his place is in the Northeast (you have to fight some fire giants first). On the 2nd floor, in the middle of the giant room is a fire pit. Yaga’s heart is kept there. In the far right of that room are doors leading to Yaga’s chambers. Enter the room and go left, you’ll find a hidden compartment on a raised dias – this is where HER heart is (along with some treasure and magic items). Return both hearts to the witch, she’ll take care of the rest. THEN go and fight Yaga.

Spoiler
=
=
=
=
=
=
=
=
=
=
=
Witch takes Yaga Shura's heart and makes him vulnerable.Have Jahiera cast Lightning on her right then, and you don't have to fight as many.