Flammable Tomb Kings and Tomb Princes have had their ancient bodies preserved through elaborate embalming ceremonies performed by their priests, and are wrapped in pitch-soaked bandages. Tomb Kings and Tomb Princes are Flammable (see p.114 of the Warhammer rulebook).
The Curse The model responsible for killing a Tomb King or Tomb Prince must immediately take a leadership test. If it fails the test, it must immediately take D6 wounds that cannot be saved. If it was a unit, randomize as shooting. If it was more than one unit, in a multiple combat, all units must take the the test as above.
Wight Blades Wights are armed with evilly enchanted weapons. Any normal weapon carried by a Wight counts as a magic weapon (but all the normal rules for that weapon still apply) The weapon also has the Killing Blow special ability (see page 112 of the Warhammer rulebook). Note that this rule does not apply to any magic weapon that a Wight Lord buys from the magic items list.