Damage per second depending on difficulty
<effect_group>
<requirement name="!EntityTagCompare" tags="player"/>
<passive_effect name="HealthChangeOT" operation="base_subtract" duration="0,8,14,18" value="10,36,51,56">
<requirement name="CVarCompare" cvar="_difficulty" operation="Equals" value="0"/></passive_effect>
<passive_effect name="HealthChangeOT" operation="base_subtract" duration="0,8,14,18" value="7.5,27,38.2,42">
<requirement name="CVarCompare" cvar="_difficulty" operation="Equals" value="1"/></passive_effect>
<passive_effect name="HealthChangeOT" operation="base_subtract" duration="0,8,14,18" value="5,18,25.5,28">
<requirement name="CVarCompare" cvar="_difficulty" operation="Equals" value="2"/></passive_effect>
<passive_effect name="HealthChangeOT" operation="base_subtract" duration="0,8,14,18" value="4.2,14.9,21.1,23.2">
<requirement name="CVarCompare" cvar="_difficulty" operation="Equals" value="3"/></passive_effect>
<passive_effect name="HealthChangeOT" operation="base_subtract" duration="0,8,14,18" value="3.3,11.9,16.8,18.5">
<requirement name="CVarCompare" cvar="_difficulty" operation="Equals" value="4"/></passive_effect>
<passive_effect name="HealthChangeOT" operation="base_subtract" duration="0,8,14,18" value="2.5,9,12.7,14">
<requirement name="CVarCompare" cvar="_difficulty" operation="Equals" value="5"/></passive_effect>
</effect_group>