defensive_blows_3.xml

<abilities>
  <ability>
    <clone>defensive_blows</clone>
    <key>defensive_blows_3</key>
    <description>
      Gain ⮃3 Shield⮃ whenever you attack an enemy.
      [p]Shield absorbs incoming damage and is shown as blue on your health bar.
      [n]Shield automatically reduces by 1 per turn.
    </description>
    <passiveInfo>
      <triggers>
        <triggers>
          KEY defensive_blows_3;
          WHEN PlayerAttacks;
          THEN GiveShield -> amount:3;
        </triggers>
      </triggers>
    </passiveInfo>
    <unlockInfo>
      <autoDiscover>0</autoDiscover>
      <unlockRequirements>
        <requiredPoints>1</requiredPoints>
      </unlockRequirements>
      <replaces>defensive_blows_2</replaces>
    </unlockInfo>
  </ability>
</abilities>