▁uses ▁this ▁to ▁defeat ▁the ▁bas ilis ks ▁outside ▁of ▁the ▁R . O . F . L . ▁headquarters , ▁to ▁kill ▁some ▁of ▁the ▁la istry g oni ans ▁surrounding ▁his ▁grand m oth ers ▁house ▁then ▁using ▁his ▁final ▁charge ▁to ▁protect ▁the ▁mort als ▁on ▁a ▁train ▁from ▁attack ing ▁Griff ins . ▁ ▁Gray ▁– ▁A ▁Spart us ▁that ▁can ▁be ▁sum mon ed ▁by ▁Frank ▁Z hang . ▁ ▁S ph inx ▁– ▁A ▁mon ster ▁with ▁the ▁head ▁of ▁a ▁woman ▁and ▁the ▁body ▁of ▁a ▁l ion . ▁Per cy ▁Jackson ▁and ▁his ▁friends ▁encountered ▁the ▁S ph inx ▁while ▁navig ating ▁the ▁lab yr inth . ▁R ather ▁than ▁tell ▁r idd les , ▁the ▁S ph inx ▁asked ▁historical ▁questions ▁which ▁An nab eth ▁refused ▁to ▁answer ▁as ▁an ▁ins ult ▁to ▁her ▁intelligence . ▁They ▁are ▁not ▁to ▁be ▁confused ▁with ▁the ▁S ph inx ▁from ▁The ▁K ane ▁Chron icles . ▁ ▁St rix ▁- ▁A ▁race ▁of ▁ow l - like ▁cre atures ▁that ▁eat ▁the ▁flesh ▁and ▁blood ▁of ▁humans . ▁They ▁also ▁cur se ▁the ▁mort als ▁who ▁kill ▁them . ▁Anyone ▁scratch ed ▁by ▁the ▁tal ons ▁of ▁the ▁St rix ▁will ▁be ▁par al yz ed . ▁In ▁The ▁Burn ing ▁Maz e , ▁Apol lo ' s ▁L ester ▁Pap ad op oul ous ▁form ▁was ▁ch ased ▁by ▁a ▁f lock ▁of ▁St rix . ▁After ▁one ▁St rix ▁gets ▁through ▁the ▁tom ato