First technique is a pseudo sensory technique based on an arbitrary word that the user decides he wants to act as the key for the technique. Since the technique can be pretty much any word it can be one of those words that is almost impossible not to use in a sentence. Like the jutsu suggests, this is better for NW applications where actual talking and communication is done between people at various locations. There's a bit of miscommunication there as the technique says "...near the user" but the range application is long range and later in the description it describes being able to work across borders. So if I were to say the key word is 'the' and somebody speaking to a comrade, enemy, clone, summon or whatever, I'd be notified of their location even if they are, lets say two landmarks away. Am I correct?
Mimicry of the HP curse of by the same name. It's a genjutsu that is very lazily but sufficiently disguised as a ninjutsu through the apparent ripples it causes to the victim's sight. As a result, ordinary shinobi would not be able to tell that this is a genjutsu on the outside without audacious metagaming. The technique also gives a paralysis which is almost OP if not for the rank of the technique being combatable by a few canon techniques without hand seals, so it's alright. Then again with appropriate layers and/or combinations this technique has incredible hax potential with no distinguishable qualities identifying it as a genjutsu. The technique lasts only two turns but the second turn vegetates them basically making them incapable of battle. Ordinarily people would say their opponent passes out from the pain, however with the existence of techniques allowing unconscious combat, using a vegetative state to make it physically impossible for your opponent to fight back is borderline. With no restrictions on other genjutsu or sound, especially for me this is a dangerous technique.