piercing_skewer_2.xml

<abilities>
  <ability>
    <clone>piercing_skewer</clone>
    <key>piercing_skewer_2</key>
    <description>
      Skewer through an adjacent enemy and a target directly behind it with ⮃+50% armor penetration⮃.
      [p]Skewered enemies are immobilized 2 turns.
    </description>
    <cooldown>8</cooldown>
    <unlockInfo>
      <autoDiscover>0</autoDiscover>
      <unlockRequirements>
        <requiredPoints>1</requiredPoints>
      </unlockRequirements>
      <replaces>piercing_skewer</replaces>
    </unlockInfo>
    <attacks>
      <attacks>
        <count>0</count>
        <animation>spell_stab_03</animation>
        <modifiers>
          <modifiers>
            <type>ArmorPen</type>
            <amount>0.5</amount>
          </modifiers>
        </modifiers>
        <debuffs>
          <debuffs>
            <reference>piercing_skewer_immobilized</reference>
          </debuffs>
        </debuffs>
      </attacks>
    </attacks>
  </ability>
</abilities>