There is also the fact that, I believe it was determined a long long time ago that actually using the Second Secret of Dhar is a violation of the Articles Of Imperial Magic, since it requires you to directly manipulate Dhar and any touching Dhar is a no-no. The analogy used was along the lines of
"The rule is You Shall Not Touch The Steering Wheel. You can slash the tires, you can shoot the engine, but touching the steering wheel (even if is a quick nudge to ram the ram off the road or to drive off of a cliff) is an automatic violation."
EDIT: My old post collecting some of the Word Of Boney statements:
As a Journeywoman, Grey Wizard Mathilde Weber is dropped into the deep end of intrigue and double-dealing after a surprise assignment to the necromancer-afflicted province of Stirland. Follow her trials, travails, feats and discoveries as she makes her way in the world and does her best to...
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EDIT2: Direct quotes:
On using second secret of Dhar instead of a normal magical dispel:
"The law says DO NOT DRIVE THE CAR. You can slash the tires, you can bash in the windows, you can cut the fuel lines. But if you touch the steering wheel, even if it's just to give it a little turn to make it drive off a cliff, you burn."
On studying and using hypothetical Ulgu Tongs as intermediate:
"You'd not be
performing what the Articles refer to as Dark Magic. The 'studying' clause is murky because looking at it to figure out if you can do the same with a Wind is okay, and looking at it to better figure out how to disrupt and counter it is valid, but at the point where you're actually manipulating
Dhar to have it act in a specific way is where any authority would draw the line."
"
That poke is still 'using'
Dhar. Just a bit and just for a moment, and you aren't actually channelling it through you, but it's still enough to get a Wizard burned. That said, using
Shyish as an interstitial Wind is explicitly banned as 'necromancy', and though I doubt a Witch Hunter will be moved by the Air Bud Rule, there's no rule that says you can't poke
Dhar with
Ulgu."