引我心魔

This name '引我心魔' can translate to something along the lines of 'leading me astray,' or more figuratively, 'temptation of my heart’s demons'. '引'(lead) implies attracting or causing while 心(my heart) and 魔(demon), taken together usually means dark sides in one's soul. Therefore this username probably refers to internal struggles or inner temptations influencing oneself from better direction or judgment.