Bitter Cold

After defeating Martel and finding their way out of the forest, The Etrurian Army faced the blizzards common of Ilia's winters.

''Ilia's harsh climate was a natural defense in itself against invaders. Sigune, flightleader of the Pegasus Knights that had turned to Bern, was preparing to attack Roy, coupled with Ilia's greatest natural weapon.''

Chapter Info
Bitter Cold is chapter 19 of Fire Emblem: Fūin no Tsurugi if you take the Ilian route (which happens if by the end of chapter 16, the experience points gained by Thany and Tate were more than that of Sue and Shin).
 * Boss:Sigune
 * Visit 2 villages for Aircalibur and Energy Ring
 * Units out:13

In the Shops
Vendor:Thunder, Lightning, Flux, Heal, Mend, Physic, Restore, Door Key, Chest Key