Naethyn's Bird Summoning

Name: Misor

Rank: A

Element: Wind

Personality: The Birds that are summoned merge together with the summoners personality.

Looks:
Misor This bird summon is very large. Misor is white and has velvet smooth fur. The wingspan of this bird is ten foot long and stands about six feet tall.

Weight: Unknown, weight changes with form.

Height: six feet tall

Specialty: Misor can change itself by splitting in half, ie duplicating. Misor's stats deplete by whatever amount his duplicates. (For example: if he duplicates to have three of him they all have 3.3 foot wingspan and are 2 feet high.)

Family: Bird

Description: Naethyn found this bird hurt and injured in Kumogakure's training center and took it on as his own.

Jutsu:
Name: Millions of Birds
Rank: B
Element: --
Description: Misor duplicates into a million copies and becomes nearly infintessimal mainly swarming onto the enemy trying to distract it.

Name: Wind Current Kick
Rank: A
Element: Wind
Description: Naethyn centers the chakra in his feet as he summons wind with his Kaze Soujuu and Misor spirals it around constantly creating a wind current and Naethyn runs and kicks the wind current towards the enemy. When dodged, Misor will use its wings to force it into another direction back towards the opponent the only way to stop this technique is to destroy or cancel the wind current.

How is this "A" rank if your a chuunin?