This subplugin adds the ability for bosses to say something upon a difficulty change.
SF2 Modified, CBaseNPC, and More Colors are required to compile. Download them here:
https://github.com/DoctorMcKay/sourcemod-plugins/blob/master/scripting/include/morecolors.inc
https://github.com/Mentrillum/Slender-Fortress-Modified-Versions