insanemonkey
Member
I don't think Tobirama was on Izuna's level. In the manga it stated Izuna and Madara were equals in every way. I bet since Tobirama is a mean guy, Izuna was busy fighting Hashirama, while Madara was somewhere else, so Tobirama took advantage of this and used Space-Time flying thunder god slash to mortally wound Izuna. Also I think Izuna and Tobirama really hate each other cuz Tobirama hates Uchiha, while Izuna has huge Uchiha pride. So yeah... Tobirama caugt Izuna off guard.