Since you don't wanna learn the above one. So we're doing this one..

(Ninjutsu: Kunai Boudai) - Ninja Style: Kunai Expansion
Type: Supplementary
Rank: B
Range: Short-long
Chakra Cost: 20
Damage Points: N/A
Description: After throwing kunai, user makes "Ram" handseal, expanding the size of the kunai to 2m in length.
Note: -Can only be used on maximum of 2 kunais at a time.
-Can only be taught by Enzup.

okay. so tell me all pros, cons, and possible uses of this technique you can think of.