You are right
So to the techniques
Kinjutsu: Shoushagan no Jutsu) - Forbidden Technique: Vanishing Facial Copy Technique
Chakra Cost: 20
Description: Shoushagan no Jutsu is a Ninjutsu technique used for spying. A dark technique, the jutsu involves the removal of the face of the person to be impersonated. By wearing their face and clothing, the ninja can impersonate the original without others being aware.
Tell me how this defies the laws of nature
Can the portal come from any angle like above the opponent etc?You are correct.
So next up is my favorite.
( Kinjutsu: Edo Fūmetsu ) - Forbidden Technique: Impure World Seal Destruction
Chakra Cost: 40
Damage Points: N/A
Description: The user claps their hands, causing a coffin, much like the ones used in Impure World Reincarnation, to erupt from a portal near the opponent. The coffin opens up, and ghostly arms reach out from the coffin and catch the opponent. If they successfully catch the opponent, he will be immobilized and unable to react. The arms drag him into the coffin and take him to the netherworld, a dimension separate from reality and which can only be escaped from via Space/Time techniques.
Note: The arms reach only up to short range of the coffin's position and lack kinetic force.
Note: This technique can only be used twice per battle.