Ryuu custom earth jutsu.

Name: Earth release: hidden pitfall
Rank: D
Type: ninjutsu
Used For: Offensive, defensive
Element: Earth/Doton
Range: Up to a 5m distance, depth is 10m.
Duration: Indefinite
Hand Seals/Charge up: Snake seal.
Description: This jutsu's primary purpose is to create a hole within the earth, the user uses the snake seal and then places their hands upon the ground, wherever they have focused their chakra the earth will shift creating a hole within the ground. The ground above the hole will be kept intact creating a shell so the hole cannot be discovered easily, this shell is stable enough to stay in place on it's own but once stepped on the ground will give way to anything over fifty pounds. Useful for trapping opponent's in an enclosed space as the diameter of the hole is only a little over 1 meter making it difficult to move freely, as a bonus the user can also use this trap to escape an opponent's attack by jumping into it freely.
Weakness: If the user has not memorized where the trap hole is they are just as likely to fall into it as the opponent is, also while the shell is stable when left alone vibrations of enough force nearby can cause it to break apart revealing the hole to the opponent. The shell does not instantly crumble though, those with bukijutsu adept can react in time if they also possess taijutsu adept as they will have the reflexes and speed to move themselves.

Well I changed the weight and vibration thing but the weakness of sitting there with hands on the ground would make this all but useless seeing as my character would then be defenseless. Also one can make a hole without the top layer of dirt falling into the hole in reality so it should be easily done here as well, I added the weakness of being able to dodge it with the necessary skills is that enough?