My fort just got hit by its first attack: a cyclops wielding an artifact copper mace. I only really have a token military at this point, composed mostly of migrants who happened to arrive with some combat skills. Included in that category is a pair of necromancers. And as foolish as that is, just this once, it worked out in my favor.
2 recruits were the first to respond. They were promptly crushed. The militia commander, a competent swordsdwarf who arrived shortly thereafter, met a similar fate. Then came the necromancer. The cyclops had already charged away from the dead dwarves, so no, the necromancer did not raise his fallen comrades to rejoin the fight. No, what the necromancer did, as he and the cyclops met in battle just over the refuse pile, was raise a bunch of sheep wool that I'd forgotten about.
But for whatever reason, the sheep wool was hostile to the necromancer and immediately attacked him. Which caused him to enter a martial trance just as he started fighting the cyclops. The cyclops couldn't get in a single hit and the necromancer's strikes landed with unprecedented precision. The very moment I saw in the combat report that the necromancer's spear had pierced the cyclops's heart, I took the entire squad off duty, fearing that either this necromancer or the other one might try to raise it. As soon as it bled out, I had its body dumped in the volcano just to be sure.