What are Frontier Coins used for? Sage MacDonald March 28, 2018 23:08 Updated Frontier Coins are usable in the ‘Frontier’ tab of the LOTB shop to purchase Character Souls, Skill Shards, and Mythic Souls. You earn 100 Frontier Coins for every Eternity Soul, Trooper Soul or Lilith Soul opened. Related articles Fallen Fortress Dungeon Details I accidentally sacrificed an important character! I successfully purchased a pack with in-game currency, but it hasn’t shown up yet! I'm not seeing the rewards I've earned! What is Gold used for? Comments 0 comments Please sign in to leave a comment.