▁und et erm ined ▁evil , ▁the ▁Val ar ▁sent ▁five ▁Mai ar ▁to ▁Middle - ear th . ▁T aking ▁the ▁form ▁of ▁w iz ards , ▁they ▁were ▁led ▁by ▁Sar uman . ▁Un s ure ▁of ▁the ▁origin ▁of ▁the ▁evil ▁power ▁in ▁Dol ▁G uld ur , ▁the ▁w izard ▁Gand alf ▁was ▁sent ▁to ▁investigate . ▁However , ▁Sa ur on ▁hid ▁from ▁Gand alf , ▁waiting ▁for ▁four ▁hundred ▁years ▁before ▁returning . ▁Ar ound ▁the ▁same ▁time , ▁the ▁One ▁Ring ▁was ▁found ▁by ▁a ▁Hob bit ▁named ▁Sm é ag ol , ▁who ▁became ▁utter ly ▁cor rupted ▁by ▁it , ▁living ▁in ▁the ▁c aves ▁of ▁the ▁M ist y ▁Mountains , ▁and ▁phys ically ▁transform ing ▁into ▁a ▁creature ▁known ▁as ▁G oll um . ▁For ▁five ▁hundred ▁years , ▁G oll um ▁was ▁consum ed ▁and ▁cor rupted ▁by ▁the ▁Ring . ▁Event ually , ▁Gand alf ▁was ▁able ▁to ▁determine ▁the ▁evil ▁presence ▁in ▁Dol ▁G uld ur ▁was ▁indeed ▁Sa ur on . ▁Gand alf ▁reported ▁back ▁to ▁the ▁White ▁Council , ▁but ▁Sar uman ▁dis su aded ▁them ▁from ▁moving ▁against ▁Sa ur on . ▁Only ▁when ▁he ▁learned ▁the ▁One ▁Ring ▁may ▁be ▁in ▁the ▁vic inity ▁of ▁the ▁Glad den ▁Field s ▁did ▁Sar uman ▁agree ▁to ▁attack ▁Sa ur on , ▁hoping ▁to ▁find ▁the ▁Ring ▁himself . ▁The ▁Council ▁drove ▁Sa ur on ▁from ▁Dol ▁G uld ur , ▁una ware ▁that ▁he ▁knew ▁the