Hmm, if repel attempts do trigger special weapon abilities I have a sudden urge to repel with a Heart Finder Sword or Elf Bane. Unfortunately neither is particularly long, so maybe a Demon Whip, Vine Whip, Bane Blade (2-h), Thorn Spear, or if I have the construction and gems, Trident from Beyond.
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People do not like to be permanently transformed and would probably revolt against masters that tried to curse them with iron bodies.
Pigs, on the other hand, are not bothered, or at least they don't complain.
-- Dominions II spell manual