CHAT MSG SPELL SELF DAMAGE

"CHAT_MSG_SPELL_SELF_DAMAGE"

Fired whenever you cast a harmful spell, be it direct damage or debuff of any kind, be it Warrior's taunt or DoT. arg1 holds the exact same string that is posted to the Combat Log. (eg. "Your Fireball hits Snivvle for 842.")

Also fired when your spell does not actually take effect; ie. if it is resisted, or if the target is immune. A "resist" message is "Your Banish was resisted by Felguard Elite." while an "immune" message is of the format "Your Fire Blast failed. Firelord is immune."