Sarkin Byzantine Michael VIII Palaiologos yayi ƙoƙari ya yi amfani da wannan yanayin kuma ya shiga cikin Bulgaria.Ya aika Ivan Asen III, ɗan tsohon Sarkin sarakuna Mitso Asen, don neman sarautar Bulgaria a shugaban babban sojojin Byzantine.A lokaci guda, Michael VIII ya tunzura Mongols don kai hari daga arewa, wanda ya tilasta Ivaylo ya yi yaki a bangarori biyu.Mongols sun ci Ivaylo kuma suka kewaye shi a muhimmin kagara na Drastar.A cikin rashi, da nobility a Tarnovo bude kofofin zuwa Ivan Asen III.Duk da haka, Ivaylo ya karya kewaye kuma Ivan Asen III ya gudu zuwa Daular Byzantine.Michael na VIII ya aika manyan sojoji biyu, amma ’yan tawayen Bulgariya sun ci su duka a tsaunin Balkan.A halin yanzu, masu sarauta a babban birnin sun yi shelar a matsayin sarki ɗaya daga cikin nasu, mai girma George Terter I. Makiya sun kewaye su kuma tare da raguwar goyon baya saboda yakin da ake yi akai-akai, Ivaylo ya gudu zuwa kotun Mongol Sarkin yaki Nogai Khan don neman taimako. amma daga karshe aka kashe shi.Gado na tawaye ya jimre duka a Bulgaria da kuma a Byzantium.