Path of the Cerulean Dragon: Tail Spikes

First using Path of the Cerulean Dragon to grow a tail, the user stabs their tail into the ground and starts to manipulate their tail growth, causing their tail to break off and spilt into multiple tail. Running a considerable amount of chakra through the tail, the tail starts to harden. Using the multiple tail growth beneath the ground, the user brings them up as some sort of spikes impaling their opponent.