Money is the best

Unlocked by

 * Tell Me Your Wish

Steps to Completing

 * 1) Talk to Gallagher at the Mercenary Outpost.
 * 2) Obtain Ice in Battle Quest Frost Stones.
 * 3) Talk to Gallagher at the Mercenary Outpost.
 * 4) Obtain Eternal Fire Bloom in Battle Quest Source of the Rumor.
 * 5) Talk to Gallagher at the Mercenary Outpost.

Stories Unlocked

 * Libertine of Hoarfrost Hollow (unlocked in step 2)