blade_tactician.xml

<abilities>
  <ability>
    <name>Blade Tactician</name>
    <key>blade_tactician</key>
    <skill>blades</skill>
    <icon>blade_tactician</icon>
    <tagline>"Stop swinging like a madman. Watch carefully—this is how it's done."</tagline>
    <description>
      -1 attack energy cost.
    </description>
    <type>Passive</type>
    <passiveInfo>
      <modifiers>
        <modifiers>
          <type>AttackCost</type>
          <amount>-1.0</amount>
        </modifiers>
      </modifiers>
    </passiveInfo>
    <unlockInfo>
      <autoUnlock>-1</autoUnlock>
      <autoDiscover>0</autoDiscover>
      <unlockRequirements>
        <requiredLevel>0</requiredLevel>
        <requiredPoints>1</requiredPoints>
        <requires>arcing_blade</requires>
      </unlockRequirements>
    </unlockInfo>
    <requirements>
      <requirements>
        <type>Weapon</type>
        <params>
          <params type="weapon">Blade</params>
        </params>
      </requirements>
    </requirements>
  </ability>
</abilities>