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 the 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.