Patch 2.1 and 1.41.

There have been some amusing changes in necromancy, even almost logical ones. But Dark Energy, to put it mildly, is surprising. They could have made it similar to mana (each hero has their own, and it regenerates smoothly), and I would have understood, but as it is...
I wonder, how will the ability to raise archers work now? It would be good to introduce an ability that would always allow raising an upgraded unit, otherwise, you won't be able to get enough stacks.