He runs through the forest path connecting The Cloud to The Leaf , the leaves are dark green and cool and shady , there is a popular inn which he walked by , he regrets declining B's offer to join him for some sake.
He realized one thing at the halfway point.
He picked up Nagato's Chakra signature.
As an Aburame, Shikuro can cloak his chakra down to zero; they shouldn't be able to pick him up.
He sees Izuna Uchiha standing at his 12 o'clock. Shikuro literally skids his feet and analyzes.
"How could this have happened? … Izuna is Nagato's Akatsuki Partner but how did they sense me?"
The Idea just hit Shikuro like a bolt of lightning, Nagato's Rinnegan.
It's a dojutso connected to the tailed beasts themselves, Nagato didn't sense Shikuro, he sensed the meteorites in his backpack.
Shikuro fluttered his sleeves as if there were no arms inside them, he was getting ready to fight Izuna and he was hoping for Nagato to drop by any moment, but it wasn't Nagato.
It was Orochimaru, Shikuro's childhood friend. Followed by Kakuzu, Nagato and the rest of new Akatsuki.
Shikuro is the first choice commando for Roots but never did he expect to be in a situation like this.
He continued his original attack towards Izuna, a swarm of Kukaichu tried to envelop the Uchiha but Nagato effortlessly protected his partner with a shinra tensei and maintained eye contact with Shikuro.
Shikuro's expressionless face finally sported a smirk. The Kukaichu diverted from the shinra tensei and continued on towards Konoha.
Shikuro waited for the Shinra tensei to expire and used Insect Flicker to take the place of the Insects beside Izuna, He stretched out both of his hands, and with his left hand he absorbed Izuna's Chakra while with his right he poisoned Nagato.
He continued onwards on his path towards Konoha, Now using Insect Flicker with every step of the way.
Madara pulled forward "Katon : Flash Fire Jutsu !"