Katsuyu is irrelevant. Minato has the tools to avoid her and the speed to target Tsunade and Sakura, leaving Katsuyu confused and useless. Once they get tagged, they get diced to death.
Minato teleports Kaytsuya into the ocean via the ftg kunai he has there. Before the excuses of "burr nooo, thaad es preep". Irrelevant whether its allowed or not, should be to be honest. Makes no difference anyway, the location in op says obito vs naruto and sasuke, which is the same battlefield by the ocean. Minato's clone goes there and throws a kunai into the bottom of the sea. Minato then teleports katsuya into the sea.
The salty sea water dehydrates her salty slug body and it's gg ms slug. =D. Tsunade and Sakura are of no trouble at all, Sakura can even be dealt with by a clone.
What can he not do to them? Byakugou/=/ invinsibity. It's basically just giving them extra lives, that run out very quickly.
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Bear in mind. Tsunade was not shown to be injured that much in that fight.
Out of all base hokages, Minato has the fastest body flicker. He essentially controls the range of engagement, and will be the only one landing hits. Sad thing is, if summoning on both parties and FTG were restricted, base Minato could win against either of them with nothing more than his kunais. Also, master of sealing jutsu VS a jutsu based on a seal. Wounder how that'd turn out.
In addition, Minato has the reverse contract seal, gg Katsuyu. It's not like they'll not be hit by Minato in this fight. Even if he couldn't, giant summons have a time limit.
You're the one who doesn't understand. Your only way of winning for Minato is decapitation, which isn't happening against an opponent that reacted instantly after moving at the speed of light.
True, summonings have a time limit, always forget this. Even Madara couldn't keep kurama summoned too long. Minato can easily wait it out, not like he's getting touched either. Tsunade and Sakura will get marked, it's unavoidable. No possible way to remove the marking, so it's just blitz after blitz after blitz, until they die.
You're the one who doesn't understand. Your only way of winning for Minato is decapitation, which isn't happening against an opponent that reacted instantly after moving at the speed of light.
