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Winner, you're welcome!
Arachne - a sword of the undead dynasty.
In the description when obtaining level 4, the sword gives your troops the ability - "Drain" (15% of the damage dealt replenishes their own health)
For me, this percentage (depending on the hero's level) is much higher than 15%.
I could easily attack deadly enemies. It wasn't possible to win without losses, but with this, two squads survived completely.
Two swords in one hand!
Here, I have the "Silk Sword of Kirin" level 4 in my hand.
Troops receive the following bonuses:
+5 to initiative
+5 to fortune
+1 to movement
and also "Drain" from "Arachne".