Current questions and answers regarding the map editor.

Here's an example of how it can be used:

function DefenderCreatureMove(Unit)
  if GetCreatureType(Unit)==CREATURE_SNOW_APE then
    SummonCreature(DEFENDER, 54, GetCreatureNumber(Unit), 13,8);
  end;
end;

What will happen: each time it's an enemy's turn and a Yeti is present, a number of creatures with ID 54 will be summoned, equal to the number of Yetis in the stack. It looks a bit unconventional for a scripting language, but it works.