Using the giant boulder as a distraction Onnoki choose to retreat, now you must be thinking why he has chosen to retreat, is quite simple actually.
The situation of the 5 Great Villages causes a certain impasse, principally because most Kages have similar strength, it's not like in the past where Konoha has an absurd strength advantage (Hashirama era).
The battle has ended but the war still goes on, both Kages decided on a non-interference agreement on the war so from now on our troops can rest assured that no Kage will come to battle, well this says nothing on S plus ranking shinobi of their respective villages so is still quite dangerous.
Well, I gained a Huge profit during this battle, besides having seen the uses of Onoki Kekkei Tota and Kekkei Genkai (in the novels/wiki is said that Onoki has lava release so I will put it here) my principal gain was 2 Jutsus that I was able to see Onoki performing, the [Earth Release: Added-Weight Rock Technique] and [Earth Release: Light-Weight Rock Technique].
The [Earth Release: Added-Weight Rock Technique] is a technique that enhances the target gravity at the user's discretion. this is basically my own mobile gravity chamber, and if I combine it with the [Rock Fist Technique] I was using prior to this to train, plus my insane regeneration using Mokuton Chakra and a future sage body, my body training will be magnificent. This technique has an evolved form the [Earth Release: Ultra-Added-Weight Rock Technique] is basically the same as the previous technique but better in all aspects, from your consumption to the effects. And the best part is that I've copied it as well.
The other one is the [Earth Release: Light-Weight Rock Technique] contrary to its counterpart, this technique reduces one's gravity, making it much lighter. The atmosphere, along with their body, can be lightened in order to take flight and increasing their maneuverability. With enough practice, the user can control their flight through the sky with specific bodily movements, this is the technique Onoki uses to fly and with mastery, you can even reduce the weight of other things, even when I reach the Liquid state I will be naturally able to fly but having this technique can be of immense help principally to use of support on other Jutsus, imagine being able to control the weight of your Jutsus at will, I will be more of a monster than I already am.
The sad part is that both techniques require a high mastery of the earth affinity which I don't have right now, one of my first priorities when I return is to train my elements to the max, I won't train than now because first I want to improve my other ninja skills on this war, second, it consumes I hight amount of time and is boring as hell, so I will only use [Wood Clones] for this bullshit that I need to spend more than 10 years of my life training to master.
After the battle, the war continued normally we returned to the cycle, more and more my shinobi skill became refined, my steps don't make sounds anymore my taijutsu more fluid and precise, everything was going good until the captain of my unity comes with a bunch of other captains.
Captains: Everyone We have an announcement to make.
Everyone looks to the captains foolishly believing on a vacation of sorts.
Captains: We are going to Suna.