: The way that person probably did it was to place a huge
: number of invisible dead units and would make one
: appear out of that bunch. But for what I have seen on
: Myth you can't make a unit appear on the map if it
: wasn't already on it as a visible or an invisible
: unit.
: -Pyro the bright red shadow
There are nine undead invisible units placed on the map. The Warlock is just simply teleporting the unit to where ever he drops the head. So it works just like the Teleport feature by useing the special attack to place the marker only it teleports the ressurected unit there.
So you can have a bunch of invisible foot men on the map somewhere and when the horse unit dies it drops a marker instantly teleporting a footman soldier at the death scene (you will want to modify the "teleport" effect otherwise it would look silly).
-Road