Thanks for asking the main ability of Naruto´s Bankai is Entei Ashi (Claw of the Fire Emperor), this attack is similar to Ichigo´s getsuga tensho, is a pure concentration of crimson red reishi (kyubi reiatsu) and a bit of blue reishi on the borders (naruto reiatsu) that when it hits the target originates a massive explosion that turns the reiatsu into crimson red flames with a destruction power near to Ryujin Jakka level when Yamamoto uses Taimatsu technique (Naruto on my story is a Yamamoto student and Genryusai was naruto´s grandfather disciple the great and fearsome Kurama who died in the 1000 year War on strange circumstances, but no more spoilers I´m reediting my fanfic so for that you you will have to wait and is on spanish, perhaps with some help I will translate it to english some day), this the main ability of naruto bankai. I´m Jok-kun the one who request this paypal commision to. Another ability is that