(Possible spoiler warning)

 

I got into this series of caverns, and made it into the yeti's room via the crevices.

 

There I can stand on a ledge and look at him, but I can't do anything. If I get to the yeti through the big opening, I'm being pushed back by his scream.

 

Now I really don't know what to do, and have been wasting lots of time... could anyone plz help?

When standing on the high platform in the Yeti room look on the wall behind you.. It's a painting on the wall, study it then you can use the horn and shout in it.

 

When you shout, the Yeti will get terrified and pass out. Because Yetis doesn't like high screaming sounds or something.

Done, ty :)