And this part here always reminded of the singular lying (spirit) which is likewise after (the working of) Satan but still send by God (as one) even him into the plural (prophets) in Kings, showing a singular spirit goes out to work in the many
And the LORD said, Who shall persuade Ahab, that he may go up and fall at Ramothgilead?
And one said on this manner, and another said on that manner.
And there came forth a spirit, and stood before the LORD, and said, I will persuade him.
And the LORD said unto him, Wherewith?
And he said, I will go forth, and I will be a lying spirit in the mouth of all his prophets.
And he said, Thou shalt persuade him, and prevail also: go forth, and do so.
Now therefore, behold, the LORD hath put a lying spirit in the mouth of all these thy prophets,
and the LORD hath spoken evil concerning thee.
Shows similarly to this portion of scripture
2 Thes 2:9 [Even him] whose coming is after the working of Satan
with all power and signs and lying wonders
And with all deceivableness of unrighteousness in them that perish;
because they received not the love of the truth, that they might be saved.
And for this cause God shall send them strong delusion,
that they should believe a lie:
Whereas it does show so much (above in Kings)
And he said, I will go forth, and I will be a lying spirit in the mouths of all his prophets
The apostles only confirm the same thing shown before
2Thes 2:11 And for this cause God shall send them strong delusion,
that they should believe a lie
1Kings 22:23 Behold, the LORD hath put a lying spirit in the mouth of all these thy prophets
The cause as shown in Thess is
Because they received not the love of the truth, that they might be saved.
And for this cause God shall send them strong delusion, that they should believe a lie
So there is a singular lying spirit sent forth in Kings by God (to work a lie there) even as God (because they receive not a love for the truth) send one [even him] after the working of Satan (to believe a lie)
2Thes 2: 9 [Even him], whose coming is after the working of Satan with all power and signs and lying wonders,
But it does show him (one/singular) lying spirit which works in the many and shows the same singular /plural concept in Thes.
This is not my kind of conversation, I must really sit this out, but I can see the concept (when comparing)