Echoes of the Void

Good scenario, I liked it.
When I first tried to pick up Sandro's cloak, I was very surprised by what was inside and how strong it was. So, after gathering an army and buffs (5 spirits, +13 luck, +10% health from map enhancers), with stats/equipment ( http://c2n.me/3RNKo9T ), skills - ( https://c2n.me/3RNKEfU ), army http://c2n.me/3RNKVNd. After the battle, I was expecting a battle like this ( http://c2n.me/3RNK9dV ), in which my archers were somehow recolored - even though I had a bow equipped, I only lost 1 attack. A Phantom would have helped in the last battle, which I forgot to learn in the cities, as any spell that costs mana would have been countered by Naadir's counterspell (I took Summoning for balance and banishment), but I won without a Phantom. I thought that since the hero is under a permanent counterspell, the creatures would be too, but they cast spells normally)

In the first battle, under the Ring of the Magi, the catapult managed to destroy two towers in the first turn :)

At the beginning, I almost lost, once after 2 attacks I survived with 5 peasants (not single units, in one slot, in a battle with full armies).

I don't know about the levels, I took 10 defense, it's more useful than 2 stats per level and 2 skills for "filling in the cells." I had 1 unfilled cell - an experienced commander, in battle = 0

Is there a restriction for the "Vampirism" spell on the map, and if so, where can it be found, in the cities or in the store?