Per 
Object class: Euclid
Special Containment Procedures SCP-4154 is to be contained in 5 m x 5 m area on bookstand .SCP-4145 requires 3 bookshelves of new books every week to satisfy its hunger for knowledge. SCP-4145 has to be dusted-of every day. No more then 1 D-class personnel and 2 armed guards are allowed to step in containment room. Personnel must enter containment room exactly at 5pm (17:00).If entered in any other time without SCP's 4145 agreement personnel will automatically be absorbed by SCP-4145 in order to get more knowledge. No action but cleaning and replacing books without 05-councils approval is allowed.
SCP-4145-2: SCP-4145-2 is shadow humanlike creature approximately two meters in high . SCP-4145-2 has armor of unknown origin and sword of around 1100 mm in length and around 5 mm in thickness
When approaching SCP-4145 regardless of action SCP-4145-2 will appear and ask purpose of arrival there are 3 possible outcomes
First outcome is replaying to SCP-4145-2 that they have come of purpose of dusting-of and to replace books for SCP-4145. SCP -4145-2 upon getting that answer will retreat to left corner of containment room and stay there until personnel are done with dusting-of SCP-4145 and replacing books . If any personnel attempt to steal SCP-4145 . They will immediately be attacked and killed by SCP-4145-2 .
Second outcome is replaying to SCP-4145-2 with request of seeking answer . When SCP-4145 receives this answer it will stand behind bookstand and wait there until subject is done with asking .When asking subject has to find page with exact date at time and write its question on left page .When answer is received subject will automatically age 1 year. If SCP-4145 refuses to give and answer or it doesn't it will grant subject with rejuvenating them 1 year this works only when question is asked first time after that SCP-4145 will stay silent.
If any action is attempted to abuse SCP-4145 guards are ordered to immediately neutralize threat
WARNNING: SCP-4145 will take one year away directly from asker regardless of subject writing question
Additional:SCP 4145 has been found in national library of Rome in year 19██ but it was contained in 20██ in national library of London.
