Posts from Editing creature abilities or adding new ones.
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It's so imbalanced that physically strong creatures of level 6 can take down an entire single creature, even though their attack is often much stronger, and it doesn't matter at all whether one creature or a million uses this ability? So far, I haven't seen any creature other than the ones mentioned above that have been given this ability. And what you're suggesting would make it completely useless. By the way, it doesn't work on mechanical or machine units.
Besides, there's no way to change the code of how abilities work (we tried, but it didn't work); you can only change some numerical parameters.
Where did you see the imbalance here?
It's so imbalanced that physically powerful level 6 creatures can take down an entire creature, even though their attack is many times stronger, and it doesn't matter at all whether one creature or a million uses this ability? So far, I haven't seen any creatures other than the ones mentioned above that have this ability. And what you're suggesting would make it completely useless. By the way, it doesn't work on mechanical or machine creatures.
Besides, there's no way to change the code of how abilities work (we tried, but it didn't work). We can only change some numerical parameters.
But what if it's 1v1 in the literal sense? Then Undead can take down even a Cyclops or a King of the Universe, and that's not right, and that's what I'm getting at.
Added 3 minutes later
In general, according to Folklore, plague is death that reaps the weak – like a virus, while the strong remain alive. So, you could make it so that it decimates the weak by +10, but the ability doesn't work on strong creatures, then a certain balance would be maintained, and the ability wouldn't be a throwaway. And there would be some realism.
But what if it's 1v1 in the literal sense? Then Necropolis can defeat even a Cyclops or the King of the Universe, and that's not right, that's what I'm getting at.
In general, talking about a 1v1 battle in a turn-based strategy with armies, heroes, upgrades, and artifacts is pointless.
Added 2 minutes later
You probably don't know about the devastating blade of the Dungeon Lords - the creature kills 1 unit + adds damage from its attack, which makes it even more deadly than the Grasping Strike.
In general, talking about a 1-on-1 battle in a turn-based strategy game with armies, heroes, upgrades, and artifacts is pointless.
There are usually not many strong creatures in a squad, and even 1 creature can significantly influence the outcome of the battle.
BUT – its alternative, the sword, deals 2 HP damage per enemy – that's a really cool blade. And the Vorpal Sword is just an additional nice bonus.
There is an ability called Crystal Skin, which grants immunity to the Vorpal Sword and Deadly Grasp, so it won't kill any king after all

Here is the king himself – see the screenshot. He has 28 attack and 18 defense from the hero (6 speed and 16 initiative are his own, the rest is from artifacts), everything else is his own. The arrow shows what will prevent Harbingers or Cave Lords from killing him.
So, firstly, you greatly overestimate this ability, and secondly, no one knows how to technically make it happen
There is an ability called Crystal Shroud.
I think it was removed. How can I find it?
<Item>ABILITY_CRYSTAL_SCALES</Item>
where do you see imbalance here? you can only change some numeric parameters.
Can you change the number of killed creatures for it? from its - 1, to say 50? or better make it random - from 20 to 100. And with its current state - yeah it's junk, I actually removed it for now, since it essentially does nothing. And for strong creatures, I just set -
so that instant-kill abilities don't affect them at all.
<Item>ABILITY_CRYSTAL_SCALES</Item>