what kind of sacrificing are we talking about here? there is an acolyte ability where you can sacrifice it to a scrificial pit, turning it into a shade. Also, there is a hero ability death pact (and dark ritual) the first which sacrifices the unit for hp, and the second that sacrifices the unit for hp and mana.. but both of those (i think) require the unit sacrificed to be classed as undead.
Kill Target Unit of Ability Being Cast
Set SomePoint = Position of (Target Unit of...)
Create 4 SomeUnits at SomePoint
Custom script: call RemoveLocation(udg_SomePoint)
then instead of killing the casting unit, kill the targeted unit with the added condition being that it is the frozen lord, and also create those 4 creeps at the position of the targeted unit
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.