Unbreakable Fate is an Arcanist Skill, found in the Soldier of Apocrypha skill line.
Base Skill: Fatewoven Armor
|Forge defiant runic armor around you, granting 5% Block Mitigation and Major Resolve for 20 seconds, increasing your Armor by 5948 for 20 seconds. Consume Crux to gain 5% additional Block Mitigation per Crux spent. While the armor persists, taking damage applies Minor Breach, reducing the Armor of your attacker by 2974 for 6 seconds.|
Unbreakable Fate is a morph of Fatewoven Armor base skill. The other morph is Cruxweaver Armor.