On Ali Mardan's arrival, Iwaz retired to his post making over the charge of the province to Ali Mardan. His policy of blood and iron, however, soon made Ali Mardan unpopular. Taking advantage of this situation Iwaz organised the discontented Khalji nobles, killed Ali Mardan and ascended the throne of Bengal with the title of Sultan Ghiyasuddin Iwaz Khalji in 1212 AD.