hortator: adhortator (who exhorts a person to do anything): impulsor: stimulator (who urges anybody on): exstimulator (very rare; rebellionis, Tac.): concitator (belli, Hirtius; turbae ac tumultus, Liv.; concitator et instimulator seditionis, Pseud. Cic.): instigator, -trix (Tac.). Sometimes fax (torch, fire-brand), or tuba (trumpet of the exciter of sedition, civil war, etc.); e.g., furia faxque hujus belli, Liv.; fax belli Sertorius, Velleius; tuba belli civilis, Cic.). Excitator very late (Prudentius).