-- I have also tried PLAYER_TAKES_DAMAGE and OBJECT_TAKES_DAMAGE, but those triggers don't appear to work with SecondaryObject() so that I can specify instant or sorcery only.

<TRIGGERED_ABILITY>
        <LOCALISED_TEXT LanguageCode="en-US"><![CDATA[Prevent all damage that would be dealt by instant and sorcery spells.]]></LOCALISED_TEXT>
        <LOCALISED_TEXT LanguageCode="fr-FR"><![CDATA[Prevent all damage that would be dealt by instant and sorcery spells.]]></LOCALISED_TEXT>
        <LOCALISED_TEXT LanguageCode="es-ES"><![CDATA[Prevent all damage that would be dealt by instant and sorcery spells.]]></LOCALISED_TEXT>
        <LOCALISED_TEXT LanguageCode="de-DE"><![CDATA[Prevent all damage that would be dealt by instant and sorcery spells.]]></LOCALISED_TEXT>
        <LOCALISED_TEXT LanguageCode="it-IT"><![CDATA[Prevent all damage that would be dealt by instant and sorcery spells.]]></LOCALISED_TEXT>
        <LOCALISED_TEXT LanguageCode="jp-JA"><![CDATA[Prevent all damage that would be dealt by instant and sorcery spells.]]></LOCALISED_TEXT>
        <LOCALISED_TEXT LanguageCode="ko-KR"><![CDATA[Prevent all damage that would be dealt by instant and sorcery spells.]]></LOCALISED_TEXT>
        <LOCALISED_TEXT LanguageCode="ru-RU"><![CDATA[Prevent all damage that would be dealt by instant and sorcery spells.]]></LOCALISED_TEXT>
        <LOCALISED_TEXT LanguageCode="pt-BR"><![CDATA[Prevent all damage that would be dealt by instant and sorcery spells.]]></LOCALISED_TEXT>
        <LOCALISED_TEXT LanguageCode="zh-CN"><![CDATA[Prevent all damage that would be dealt by instant and sorcery spells.]]></LOCALISED_TEXT>
        <LOCALISED_TEXT LanguageCode="zh-HK"><![CDATA[Prevent all damage that would be dealt by instant and sorcery spells.]]></LOCALISED_TEXT>
        <TRIGGER value="OBJECT_TAKES_DAMAGE" pre_trigger="1" damage_type="all">
            return (TriggerObject():GetCardType():Test( CARD_TYPE_INSTANT ) or TriggerObject():GetCardType():Test( CARD_TYPE_SORCERY ))
        </TRIGGER>
        <RESOLUTION_TIME_ACTION>
            Damage():PreventAll()
        </RESOLUTION_TIME_ACTION>
    </TRIGGERED_ABILITY>
    <TRIGGERED_ABILITY>
        <TRIGGER value="SOURCE_DEALS_DAMAGE_TO_PLAYER" pre_trigger="1" damage_type="all">
            return (TriggerObject():GetCardType():Test( CARD_TYPE_INSTANT ) or TriggerObject():GetCardType():Test( CARD_TYPE_SORCERY ))
        </TRIGGER>
        <RESOLUTION_TIME_ACTION>
            Damage():PreventAll()
        </RESOLUTION_TIME_ACTION>
    </TRIGGERED_ABILITY>