To fully upgrade the Leviathan Axe in God of War (2018), you will need to gather various resources throughout the game, which can be found in different realms and by defeating certain enemies or completing specific quests. The axe starts at level 1 and can be upgraded to a maximum level of 6 (which is indicated in the game as "Level 5" with a full bar). Here's a breakdown of the upgrade process and what you'll need for each level: **Upgrade to Level 2:** - Resources Required: Frozen Flame (x1) - How to Obtain: This upgrade is part of the story progression. You will receive your first Frozen Flame after defeating "The Stranger" boss. **Upgrade to Level 3:** - Resources Required: Frozen Flame (x1) - How to Obtain: Another Frozen Flame can be found through natural story progression as you continue your journey. **Upgrade to Level 4:** - Resources Required: Frozen Flame (x1) - How to Obtain: Continue to progress through the story, and you'll acquire more Frozen Flames. **Upgrade to Level 5:** - Resources Required: Frozen Flame (x1) - How to Obtain: Frozen Flames are usually rewarded after defeating certain significant enemies or bosses in the game. Keep progressing through the stages and completing the quests. **Upgrade to Level 6 (Max Level):** - Resources Required: Frozen Flame (x1) - How to Obtain: This final Frozen Flame is not obtained through normal story progression. After completing the main story, you'll need to enter into Niflheim and Muspelheim, two optional realms that provide end-game content and challenges. Specifically, you will need to collect a Chilling Mist of Niflheim, which can be exchanged with Sindri or Brok for the final Frozen Flame. The Chilling Mist is found within the central chest in Ivaldi's Workshop in Niflheim, which requires collecting Niflheim Alloy, Mist Echoes, and Haze Weave to unlock. Notes: - It's important to explore thoroughly and complete side quests, as they can lead to resources necessary for upgrades. - If you ever miss a Frozen Flame, Brok and Sindri's shop will have a tab that allows you to buy any resources you might have missed from bosses or in the world. - Some resources like the Chilling Mist of Niflheim may require a hefty amount of in-realm farming as the costs can be steep. By gathering these resources and visiting Brok or Sindri’s shop between your adventures, you can ensure Kratos's Leviathan Axe is always up to the challenge. Fully upgrading the weapon will significantly improve your combat effectiveness and unlock additional skill tree options.