Lìshǐ shàng bù shǎo quánchén zuìzhōng cuànlì wéi dì.
Plenty of powerful ministers in history ultimately usurped the throne to become emperor.
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Strictly historical/literary. Use 篡位 (cuànwèi) for the more common 'usurp the throne.' Modern political seizures of power are usually 政变 (zhèngbiàn, 'coup').