xRelic's post in Heavy armors for archers ,daggers was marked as the answer
<skill id="8200" levels="1" name="Light Armor Penality">
<!-- Who use this passive, can`t use Heavy and Robe, only Light -->
<table name="#Accuracy"> 0.3 </table>
<table name="#Tab-pAtkSpd"> 0.3 </table>
<set name="target" val="TARGET_SELF"/>
<set name="skillType" val="BUFF"/>
<set name="operateType" val="OP_PASSIVE"/>
<set name="castRange" val="-1"/>
<set name="effectRange" val="-1"/>
<for>
<mul order="0x30" stat="accCombat" val="#Accuracy">
<and>
<using kind="Heavy,Magic"/>
<not>
<using kind="Light"/>
</not>
</and>
</mul>
<mul order="0x30" stat="pAtkSpd" val="#Tab-pAtkSpd">
<and>
<using kind="Heavy,Magic"/>
<not>
<using kind="Light"/>
</not>
</and>
</mul>
</for>
</skill>
Make this passive.