Need More Water [Cassidy Spells]

Name: Water Arrow
Rank: Amateur
Description: The Water Bullet spell is a spiraling arrow of water that is the approximate size of a bullet, it is a high pressure water technique with properties similar to an actual bullet, capable of piercing through its opponent. This technique travels up to fifteen meters, and is shot from Cassody's mouth. Moves at 6 MPS. Pierces through amateur items and can be created from fingers or mouth.
Duration and cooldown: Duration: 1 post Cooldown: 1 per post
Strengths: Can easily go through Earth spells its rank or 1 rank higher
Can easily go through fire spells its rank or 1 rank higher
Weakness: Electric and nature based spells(Wood or Plants) will find themselves with an ease of access against this move. Those type of spells its rank or higher will easily go through it.

At most,this arrow can only go as far as the heart, then simply turns into water.

The Strengths don't apply to defensive spells.

Name: Tunnel
Rank: Amateur
Description: The user is surrounded by a faint brown aura, allowing them to dig through the ground like a mole with extreme ease. Cassidy goes through the ground as if it were water itself. Moves at normal speed. Goes down to a max of 40 meters.
Duration and cooldown: 2 posts/3 posts
Strengths: Alternative Traveling
Weakness: Can't stay underground forever

Hello Judge Cassidy! Today I will be grading your spells! All corrections are below:

Water Bullet: Ok, a few things for this one. How do you shoot it towards the enemy? Do you throw it like a baseball, aim it and it shoots out, or anything else? How fast does it come at the enemy? Also, I don't think it should be able to pierce any spell that can act as a defense spell any ranks above it, but just dent it. Finally, due to the deadly nature of the spell, change the cooldown to 2 posts.

Drowning Prison: First of all, amateur bind spells can only last 1 post, so change the duration. Also, tell me how big the sphere is in radius. Make it so that a person could potentially swim out of it as well, because this looks to me like you want an insta-death spell, and that isn't gonna happen with an amateur spell.

Tunnel: Put a max depth of how far you can travel, because for all I know you are now able to travel to the center of the earth since 3 posts can be any amount of time. Also, make the duration 2 posts.

APPROVED!

RE-APPROVED!