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This one resembles Stentor coeruleus.
I agree with your comment, John B. It was just my mistake. I also replaced the word "Greece" with "the Balkans". Thanks for noticing that.
Cordyceps fungus spores are inhaled by the insect, the fungus grows inside it, takes control of the insect and then kills it, eventually growing out of it and spreading its spores to infect more insects. So, the fungus kills the insect.
This must be some species of assassin bug (Reduviidae)