In order to gain the favour of Yrjänä, you must perform three tasks for the Lossoth people.
'Seek out Emeli across from the steam-lodge. He may have a task for you to perform that will help you obtain Yrjänä's favour.'
Emeli is near the entrance to Sûri-kylä.
You should seek out Emeli if you wish to gain the favour of strength.
Paksu-karva was last seen among worms south-east along the Ice Bay.
Emeli instructed you to seek Paksu-karva and bring him its tusk as a sign that you have completed the feat of strength required of you.
Emeli is at Sûri-kylä across from the steam-lodge.
You should return the tusk of Paksu-karva to Emeli as a sign of your success.