It's not an aspect that's why. Here is the whole concept. Blocks can be used offensively to stop others from doing something (I.E. Holding someone in place with a spell or covering a door with a gun so that no one can get through). One of the things evocation can do is block, or the caster can instead choose to create armor for half the value. So the original question is can that armor be used offensively like a block? If so a wizard could, with a 6-shift spell, give an enemy a constant -3 penalty to every action for as long as the wizard wanted to maintain the spell without spending a single fate point.

Yeah, I saw that after I posted.

As far as attacks there are a lot of possibilities. He could throw around blasts of decay/death, shards of bone or clouds of angry spirits. For blocks I'd go for walls of conjured bones or bone armor, or you could go ramirez style and have a shield of decay/death. Maneuvers could be hands reaching up from the ground to grasp others, or fatiguing people directly with decay/death, aging people supernaturally, or causing them despair by showing them their own death. There are a ton of fun things you can do with necromancy!

What I got was that the knights are an extension of the queen's will in the mortal realm. The fae aren't supposed to be able to do anything to mortals against their will (they are however free to misinterpret deals made and freely mess with those who are indebted to them). The knight is the exception. Being mortal(ish) he/she can freely affect mortals that he/she so desires. I suppose even if the queens can't force their knight to do something they would likely choose a knight that has goals that are parallel to the courts. It would be really irksome if your only mortal champion balked at every task you gave him/her.

You know you could always mod the hexing rules to fit your character. Don't know what that might cost (maybe Channeling:Magic Hexing -2?) but that would be the way I'd go if you wanted to have a conscious effect. Otherwise immunity to magic is a great way for a passive effect.

So I was reading through the book while thinking about rote spells for a character and the part about offensive blocks caught my eye. I decided to make a spell that would hold somebody (I.E. a block that prevented someone from moving). Days later I used it and it was less than effective, I couldn't draw enough shifts of power to make greater than a 5-shift effect at the time and 5-shifts really isn't that hard to meet or beat for someone remotely skilled and then the block is gone. A couple of days later I got an idea. A wizard can make a block, or using the same power make armor that is half as effective. So can we use that armor offensively, creating a lower level, longer lasting penalty to another's actions? What do you think?

I think I'd likely give the mortal a penalty to the block. A pure mortal using only their blood for power is not going to create a very powerful threshold. Though I might not if they were willing to take some stress or consequences for it.

Agreed. Declarations are free because they are supposed to make your job easier. When they stop doing that it's time to say no.