barbaric_persistence.xml

<abilities>
  <ability>
    <name>Barbaric Persistence</name>
    <key>barbaric_persistence</key>
    <skill>Maces</skill>
    <icon>barbaric_persistence</icon>
    <description>
      Using a bludgeon or mace ability extends the duration of Barbaric Breakthrough by 2 turns.
    </description>
    <type>Upgrade</type>
    <passiveInfo>
      <triggers>
        <triggers>
          KEY barbaric_persistence_trigger;
          WHEN PlayerUsesAbility -> valid_skills:bludgeons|maces;

          THEN ExtendStatusEffect -> key:«LINK:barbaric_breakthrough», amount:1;
        </triggers>
      </triggers>
    </passiveInfo>
    <unlockInfo>
      <autoDiscover>0</autoDiscover>
      <unlockRequirements>
        <requiredPoints>2</requiredPoints>
        <requires>barbaric_breakthrough</requires>
      </unlockRequirements>
    </unlockInfo>
  </ability>
</abilities>