function(_, _, message, _, _, sourceName, _, _, _, _, _, _, ...)
    if message == "SPELL_CAST_SUCCESS" then
        local s = select(2, ...);
        if s == "Thorasus" or s == "Maalus" or s == "Nithramus" then
            aura_env.source = sourceName;
            return true;
        end
    end
end

function()
    return aura_env.source or "";
end