7 How hela destroyed thor hammer ?

Any marvel fan who don't how hela lifted and destroy thor hammer should read this . In thor ragnarok you see hela telling about her past life to his guard [ i don't remember his name ] that odin use him to conquer 9 realms but one day he became good so , he stop conquest but hela don't want ro stop so , odin capture him and when odin died hela returned and thor throw his hammer but hela hold in air and break it [ many fans were thinking how it is possible] it was shown ahead in movie that thor hammer was originally hela weapon but when odin banished him thor hammer was kept in odin vault and later it was given to thor and there is one scene in which hela throw some knife on odin and thor painted glasses and which broke and we came to know about odins darks side . This is my first theory which i made on marvel and I would like to make some more in future so , share it , review it and go and read my best series I've ever written named restrictions which is bases on girls life in India . Literally go and read .