finishing_blow.xml

<abilities>
  <ability>
    <name>Finishing Blow</name>
    <key>finishing_blow</key>
    <skill>Bludgeons</skill>
    <color>d22609</color>
    <icon>finishing_blow</icon>
    <tagline>"This blow would not kill a healthy man. You are not a healthy man."</tagline>
    <description>
      Perform a finishing attack with -35% base damage, but dealing +1.5% damage for every percent
      of target's missing health.
    </description>
    <type>Target</type>
    <subType>2_Abilities</subType>
    <abilitySoundPack>finishing_blow</abilitySoundPack>
    <cost>30.0</cost>
    <cooldown>9</cooldown>
    <targetInfo>
      <type>TileSelection</type>
      <aoeTargeting>
        <selectionArea>
          <type>square</type>
          <allowTargets>
            <allowCreature>true</allowCreature>
            <allowEmpty>false</allowEmpty>
            <allowPlayer>false</allowPlayer>
          </allowTargets>
          <params>
            <params type="width">0</params>
            <params type="height">0</params>
            <params type="expandStat">Range</params>
          </params>
        </selectionArea>
        <targetArea>
          <type>square</type>
          <params>
            <params type="width">0</params>
            <params type="height">0</params>
          </params>
        </targetArea>
      </aoeTargeting>
      <abilityUseTime>
        <type>weapon</type>
      </abilityUseTime>
    </targetInfo>
    <unlockInfo>
      <autoUnlock>-1</autoUnlock>
      <autoDiscover>-1</autoDiscover>
      <unlockRequirements>
        <requiredLevel>7</requiredLevel>
        <requiredPoints>2</requiredPoints>
      </unlockRequirements>
    </unlockInfo>
    <requirements>
      <requirements>
        <type>Weapon</type>
        <params>
          <params type="weapon">Bludgeon</params>
        </params>
      </requirements>
    </requirements>
    <attacks>
      <attacks>
        <count>0</count>
        <animation>finishing_blow</animation>
        <modifiers>
          <modifiers>
            <type>MissingHealthDamage</type>
            <amount>0.015</amount>
          </modifiers>
          <modifiers>
            <type>Damage</type>
            <amount>-0.35</amount>
          </modifiers>
        </modifiers>
      </attacks>
    </attacks>
  </ability>
</abilities>