Gark has asked you to revenge him on the Mosbears who ran his tribe out of their home. Go to the Mosbear Snowfield, which used to be the Sprigg habitat, and defeat Mosbears.
Step 1. Eliminate Mosbears, the enemy of the Spriggs.
Step 2. Talk with GarkA Sprigg hiding in a corner of Mosbear Snowfield in Beluslan. It is scared and hungry.