Is this resolved yet?
AceHart meant this,
Make a trigger. When a unit is attacked, check the attackER unit if he has that ability. Then check if the attackED unit is Undead, using Boolean expression : Unit is Undead
Then just make a random integer from 1-100, if it is <= 10, cause attackER to damage the attackED for 350 damage.
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.