Marmot
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As far as I understand, the number of neutral stacks depends on the ratio of their strength to the strength of the attacking hero's army, and also on whether there is an enhanced stack: if there is, there will be at least 2 stacks. However, whether there will be an enhanced stack seems to be determined randomly at the start.
Воскресайте, камінні душі, Розчиняйте серця і чоло, Щоб не сказали Про вас грядущі: їх на землі не було…
(Василь Симоненко. Люди – прекрасні)
(Василь Симоненко. Люди – прекрасні)