Karabiner F19 Keymap – https://deadlyhifi.com/2016/02/super-duper-power-key-change-capslock-you-dont-use-it-anyway/

private.xml

<?xml version="1.0"?>
<root>
	<item>
		<name>F19 to F19</name>
		<appendix>(F19 to Hyper (ctrl+shift+cmd+opt))</appendix>
		<identifier>private.f192</identifier>
		<autogen>
			--KeyOverlaidModifier--
			KeyCode::F19,
			KeyCode::COMMAND_L,
			ModifierFlag::OPTION_L | ModifierFlag::SHIFT_L | ModifierFlag::CONTROL_L
		</autogen>
	</item>
</root>