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Find out the following personality with the Story/Incident given below:
 
This ruler is a complexion of learned knowledge and touch of cruel thoughts, thus his period witnessed the beginning of the disintegration of the dynasty. he wanted the entire subcontinent under his control. He shifted his capital from Delhi to Devagiri to facilitate the extension of sovereignty. Later renamed Devagiri as Daulatabad, after some time realising his mistake he returned to Delhi and made it his capital, the return to Delhi was due to the lack of water supply in Deccan. During his return, the city wore a deserted look with minimum population. Who was this Paradoxical personality?