The Reverend Daughter gave this consideration, for once. “All right. Let me—hmm. You know that a bone construct is animated by a necromantic theorem.”
“No way! I assumed you just thought super hard about bones until they happened.”
Ignoring this, Harrow continued: “This particular construct is animated by multiple theorems, all—woven together, in a sense. That enables it to do things normal constructs can’t possibly.”
“Like regenerate.”
“Yes. The way to destroy it is to unpick that tapestry, Nav, to pull on each thread in turn—in order—until the web gives way. Which would take me ten seconds, if I only had it at arm’s length.”
“Huh,” said Gideon, unwillingly starting to get it. “So I unpick it for you.”
“Only with my assistance. You are not a necromancer. You cannot see thanergetic signatures. I have to find the weak points, but I have to do it through your eyes, which is made infinitely more difficult by you waving a sword around the whole time while your brain—yells at me.”

Gideon the Ninth - Act Two, Chapter Fifteen