@First boldSorry, meant to reply earlier. And Necromancy is a field of Dark magic that's only allowable as Inferi, who h are akin to zombies. It'll be a CCJ for the clan. Outside of that, no other applications of it will be possible.
Your second question can't be answered because the only way to do this is via a potion. Our potions aren't ones that target the emotions to replicate or mimic anything of that nature. However, if we did have a love potion, it'd make the opponent like you but that wouldn't take away their ability to think rationally. I.e. if they fall in love, it won't make them think "well they just sent a gigantic fireball at me, I'm so smitten by them I'll stay her and get hit"
ANYWAY.
Alright, so this is the basic yet most useful one. You can transform anything with less chakra in it than the rank of the spell you use. If you hit a solid ninjutsu, you can turn it into another solid or a liquid. If you hit a liquid, you can turn it into another liquid, a gas or solid and if you hit a gas, you can change it into another gas or into a liquid. You can turn a liquid based CEJ into a cloud of air, or a wall into a stream of water, etc.
One neat trick with this is that you can change it into thing that isnt an element you do not know, meaning you can create basic a golden sword but it will not have the same properties (S/W) of Gold Release nor be as durable as it ( same rank as rank of spell used, basic item ). You can create or change things into elements you DO have with their properties, so while I can only create, for example a shower of acid rain, you will be able to create clouds of Poison Release, with the same S/W as normally. This works on chakra cost, not damage nor rank so if it has A rank chakra but does 150 damage, use of the S rank version will still work on it.
Switching allows you to switch the properties of two items as long as they are of similar size and in mid range of each other. Why, you could switch armors with an opponent...
S rank application of Transformation allows you to alter your body if you wish, taking on animalistic traits if you wish. This lasts 2 turns and up to 3 turns. Inversely, you can simply create an S rank transformation with this that follows the basic transformation rules.
Questions? Since this skill just gets stronger with each rank and does more, we'll only go over the jutsu once and with each rank you progress, you can use the next rank
So if my opponent has some solid wall, I can create it into a wall of Foam? I only ask cos i fully dont understand your example.
Also
''nor can they change the properties of something created by another Kisei unless with equal or higher power/chakra. Of course, the amount of chakra used must exceed the amount of chakra present in the object being transformed for any change''
The bold says unless with equal OR higher, whilst the underlined says the chakra must exceed the chakra present, so an an S-rank application of this jutsu (40cp) transform an S-rank armour (also 40cp) into a random gas, or would the chakra of the armour have to be lower than 40?