ers ▁of ▁O z ▁or ▁taking ▁over ▁the ▁universe . ▁Even ▁after ▁he ▁is ▁de posed ▁and ▁defeated ▁in ▁T ik - T ok ▁of ▁O z , ▁he ▁continues ▁to ▁make ▁trouble ▁for ▁the ▁inhabitants ▁of ▁O z ▁and ▁all ▁the ▁O zi ans ▁in ▁general . ▁After ▁a ▁number ▁of ▁attempts ▁on ▁O z ' s ▁peace ▁and ▁happiness , ▁he ▁meets ▁his ▁final ▁canonical ▁fate ▁in ▁Hand y ▁M andy ▁in ▁O z . ▁ ▁Princess ▁Lang wid ere ▁ ▁Princess ▁Lang wid ere ▁appears ▁in ▁Ba um ' s ▁third ▁O z ▁book ▁O z ma ▁of ▁O z ▁( 1 9 0 7 ) ▁as ▁a ▁secondary ▁villa in . ▁She ▁is ▁the ▁vain ▁and ▁spo iled ▁prin cess ▁whom ▁Dor othy ▁and ▁her ▁company ▁encounter ▁when ▁she ▁vis its ▁the ▁land ▁of ▁Ev ▁which ▁neighb ors ▁O z . ▁Lang wid ere ▁has ▁a ▁collection ▁of ▁ 3 0 ▁exchange able ▁heads ▁she ▁keeps ▁in ▁a ▁cabinet ▁constructed ▁of ▁solid ▁gold ▁and ▁stud ded ▁with ▁g ems . ▁The ▁cabinet ▁itself ▁is ▁held ▁within ▁a ▁walk - in ▁clos et ▁in ▁the ▁bou do ir ▁of ▁Lang wid ere ' s ▁palace . ▁Each ▁head ▁is ▁said ▁to ▁be ▁extremely ▁beautiful , ▁consisting ▁of ▁different ▁b one ▁structures ▁that ▁represent ▁different ▁eth nic ities ▁and ▁are ▁kept ▁in ▁their ▁own ▁separate ▁cases ▁l ined ▁with ▁mirror s ▁that ▁Lang wid ere ▁keeps ▁locked ▁with ▁a ▁ruby ▁key ▁she ▁we ars ▁around ▁her ▁left ▁w rist . ▁Instead