cluster_volley_3.xml

<abilities>
  <ability>
    <clone>cluster_volley</clone>
    <key>cluster_volley_3</key>
    <description>
      Fire a bundle of bolts down onto an area with +15 accuracy.
      [p]Targets hit by the volley receive -40 movement speed for 3 turns.
    </description>
    <type>Target</type>
    <cost>25.0</cost>
    <targetInfo>
      <type>TileSelection</type>
      <aoeTargeting>
        <selectionArea>
          <type>square</type>
          <allowTargets>
            <allowCreature>true</allowCreature>
            <allowEmpty>true</allowEmpty>
            <allowPlayer>true</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">1</params>
            <params type="height">1</params>
          </params>
        </targetArea>
      </aoeTargeting>
      <usesAmmo>true</usesAmmo>
      <abilityUseTime>
        <type>weapon</type>
      </abilityUseTime>
    </targetInfo>
    <unlockInfo>
      <autoDiscover>0</autoDiscover>
      <unlockRequirements>
        <requiredPoints>1</requiredPoints>
      </unlockRequirements>
      <replaces>cluster_volley_2</replaces>
    </unlockInfo>
    <attacks>
      <attacks>
        <count>0</count>
        <animation>spell_arrowhit</animation>
        <modifiers>
          <modifiers>
            <type>Accuracy</type>
            <amount>15.0</amount>
          </modifiers>
        </modifiers>
        <debuffs>
          <debuffs>
            <reference>slowed</reference>
          </debuffs>
        </debuffs>
      </attacks>
    </attacks>
  </ability>
</abilities>