The end is near, and no one can stop it

Question

I must warn you of what's coming, but I can't say what it is or I risk death. Please, I beg of you, figure out the clues I have left and help me save the world.

On this dreaded occasion, we must mourn;
Our electronics, they have failed to warn.

Name we cannot mutter without its wrath,
You will die when you're strewn along its path.

Your pleas for help will go unheard;
Worse than the führer, what have we stirred?

The sun will die if we don't know what to do;
Our eight-legged friend, he is our only clue.

Hint

I̥̖̲͠t͖̳̦͉͓̦'ś ̷̹̜̥͉͙̩a̕ͅḻ͢r̫̞͠e̲̭̣͍̦̺a͕͖͚̫dy ̠̮̥̤̗̲s̛̹̞̱̩̻̠̬t͔̬̞a̦r͈͚t͓͇͇̩͈̮̠i̛̩n̨̪ͅg͕̜͔̤̦̘̰ ͍t͚̭̭͍o͏ ͙ͅt̛͈a͉̣̞͎̹̺͡k̸̺̹̲̲̱̲e͚̙̪̙̟ ͚͙̰͎ov̱̼̣͕͠e̸̜̳r͚̮.̫̻̜̬̗̻ ̴̗̫̦̝ͅI̱̫̖̬ ̷̰̲̣̞͍̱c̳͜a͙̲̭͕͚͚̺͡n͖̜̥̫ ͓̰o̶̦̻ͅn̪̖͠l̡y͎͇̱̙̮̟̗ ͟g̳̱̤̖i̜̥͇̲͎̠͘v̬̝͟e̦͈ ̼͎̰̪̲̤t̮̻̙h̥̝̻͘is̞̬̜̮̪ ̭̯̹͉̳͜o̬̦̪n̷̥̤̬̼͓̯̘e̺̠̺̠̯̯̳͡ ͇͓͇̺̗̼͍la͍̺̞̠̩̱̞s̢̹̖͙̳̰̱̰t͉̥̥͓̱̀ ̼̝͙̤̱̯̘c̺̭̦͘l̺͍̰̬͘u͇̩̬͟e̥͚͉.̟͚͍ ̛̖̜Th̵̩e͍̪͈̟̙͈̱͠ ̶͔͔͕͔̫̼c̩̠̠̝͔̩͝l̜̖͔̼͎̺̣͢u͈͝e̪ ͙̙̯̮̀į̯̦̙̤̘s̲͓ ̘̗̬͙̺̜aͅͅ ҉̜̬͙̳̦̭̹ẉ̴͓͚ͅo͔r͖̙͟d̬̞̻̠̖ ̫̳̞in̺̭̣̺̭̟̠͡s̺̖̳͓i̻̯̝d̮̦͕͉͓͕ͅe̢͇̻̥ ͍̯̜͇t͙͕̥̯͉̀ͅh͕̱̩͖̟̤ͅe͓ ͈̘͔r͎͇̜̤̦̦i̢d̹̖͎̲͢d̦̫͉͍ļ̲̭e̮̲̫̳̞̫.̦͍̤͍̪̥

Hint 2

C̸̺̝̖͕̫͙͚̦͎̦̙͔͚̰̹̟̭̱a҉҉̧̹̲͈̠͇͇̲͝n͏̸̛͎̱̳̬̰̬̺͠͡ͅ ͏̧̪̥̬͎̻̺̤̜̲͝͡ọ̡̨̟̠̫͙͈̺̬̰̫̦̯̀͘ń̛͢҉̫̰͈̞̹͎̮͕̱͍l̶̛̺̭͕͍͙̣̫̙͓͕y̧̩͈͉̩̥̮̤̩̠̫̞̘̣̳͓͓̳̗͞͡ͅ ̷̳̩̬̤̻͉̳̖̻́͢͡͡ś̶̨͇̤̰̲̜͕̼̹̱͙̫͔͚͇̤͉̀͘à̸̴̡̗͇̺̜͙̭͕̙y̧͟͟͏̜͓͓̬͕͖̖̖͕̭͇̠͓̼ ̨͟͏̗̬̣̜̝̜̘̭͈̪͕̩́ͅÌ̡̱̳͚̪͉̭͔͡ ̧̣͓͔̹̙͓̱͙ṃ̸͈͉̼̲̭͓̰̞̯̪̘̀o̶̱̙̲͉̤̮̭͘͘͟͞ͅr̴̸̝̠̘͕̤̪̻͉͍̭̮̀é̡̨̛͍̫̬̥͍̦̥̙̼̤͍̖̩͔̭ͅ ͘͏̨̛͉̫̙̭̥̖͍̪̯͔̖͔̼̯ͅͅͅͅw҉̕҉͎̥͎̲͍̙͎̼͔͎̺͇͘͠o̷̵̝̬̜͔̮̻̱͔̫̗͓̠̻̹̺̹͇͇͝͠ͅr̸̷̢̖̻͎̩͚̜͚̺̝͕̼̪̲͕̝d̙̻͍̰̲̫̠͓̻̮͍̙͔̪͖͕̕͢,̨̪̳̜͇̪̭͜͡ ̴̖̳̭̥̹̗͚͉̖͈̜̫̗͔͍̭̳̟͘c̶̸̨͈̻̳̣̩̫̜̼̯͇̻̞̫̩̩͡é̛̼̫̞̣͉̮͢͞p̶̢̧͢҉̦͓̖͎͎̯̳̲̯h͢͏̡̤͔̻͈̭̤̲͙̟a̶̷͓̱̬̼̬͉̮͉̟͓̙̝̯̞̯̣̦͘ͅl̛͖̫̦̯o̝̳̰̰͘͝p̜͉͕̱͞o̴̢͓̖̪̜͎̬̟̱͎̞̥͈̝̕͝͞d̵̢̻̼͚̹̩͎̹̥̹̺͙͘͜ͅ.̸̹̱̮͍̞̥̝̼͈̙͙̘̪̟̖͚̥̀̕͜͞ͅ

Hint 3

R̂ͨ͂̎ͥ̽̅͐́̑͐ͭͭͪ͗̓ͨ̓ͬ͜͏̨̙̮͖͓͢i̡̖̯̳̮̣̗͕͔̘͗̓̋͒ͬ̈͒̏ͯ̿̓͡ͅg̴̵͈̫͎̜̜̙̗̲̭͖̫̘̪͙̝̔̑́̒͐ͫ̔͑̓́ͅh͛̋̄͒̽ͬ͗̔̋̓̎ͫ̂ͣ͒ͤ̇̂̚͏̸̡̬̗̻̞̹͉̱͖͈̹͔̪͢ṯ̴̻̭͕̮̀̉̐͑ͮ̔̔̈ͪͨ̊̔̈͊ͨͨ́ ̸̡͈̤͇̥͖̞̰̳̰̪͎̒̅̎͂ͬͥ͗͆ͭ̾͆͋ͮ̀̚͘o͉̜̼̩͙̮̝̹̥̩͇̰̥̘͎͚͋ͮ͗͑̀̐̋̋̇̑̂͠f̮͉̟͕̮͎̝̣̙ͮ̈ͭ̋̈ͭ̃̐̂͋͒̉ͩ͐̚͢͝ ̴̡̛̛͎͔̺̱̹̰̠͍̠̻͆̈̿̾̂̆ͩ̕O̸̷͂͛̽͊̇ͯ̌ͣͨ̍̊̇ͥ̃͋̕͏̦͙͉̺͔͎c̷͎̻͔̭̗̰̟̈́̉̀̇̉͆͑̈̎̀ͅť̈͐̊͏͖̰͍͈̝̝̥̫̦̱͓͟ơ̴̞͈̟̑̋ͭ́͘͡p̸̷̵͖̰̻̩͖̰̫̜̤̲̭̥̝̫̜̄̽̆̂͛͆̉̑͊̌̕͜ͅͅͅŭ̸̡̲̭̪̬͉͉̗͕̤̝̱ͥ̌ͪ͒̏͌́s̸̠̗̖̘̯̩̙͇͖̹͕͐̾ͧ̄͗͐̑ͅ

Final Hint

Ą͇̝̺̞̳͚̫̆ͬ͊̽ç̼̫͎̝̺̱̠̫͉͚̜̟̲̩̗̪̼̂͌̐̔̓̆̽ͭ̉̎ͮͮͨ̐͗ͦ̌̓̽͘ř̷ͥ̍̓͌ͩ̏̀̎͑ͧͪ̾̿̈͛ͩ҉̡̧̤͔͎̯̖͉̲̥̳̤͈̥̫͞ơ̶̶̺̲̺̩̘̇͂̑̒̏̓͆͊̄͝ş͋̈́ͫͧͥͥ͒͏͉͍̤̝͙̝͈̩̲ţ̸̨̛̬̯̜̬̲͍̩͉̱̤̩̹̥̱͕̞͎̒̋̎̓̾͑͆ǐ̹͍͕͇͚̪̪̟̙̫̯̠͖̀͛̆͒ͬ̏̒̑́̋͠c͚̬͚̱͎̭̞̻̰̫͇̮̝̠̥͙̬̓̓̋̍ͩ̆ͮ͢͡ͅ

Answer 1

I can't get all the clues but you must have summoned

Cthulhu

Our eight legged friend, he is our only clue.

Cthulhu has an octopus-like head

Hint 2:

If you read carefully, it says "Can only say 1 more word: cephalopod"

Hints:

The clue is a word inside the riddle, the word is octopus
On this dreaded occasion, we must mourn;
Our electronics, they have failed to warn.
Name we cannot mutter without its wrath,
You will die when you're strewn along its path.
Your pleas for help will go unheard;
Worse than the führer, what have we stirred?
The sun will die if we don't know what to do;
Our eight-legged friend, he is our only clue.

Right of Octopus, it spells Cthulhu
On this dreaded occasion, we must mourn;
Our electronics, they have failed to warn.
Name we cannot mutter without its wrath,
You will die when you're strewn along its path.
Your pleas for help will go unheard;
Worse than the führer, what have we stirred?
The sun will die if we don't know what to do;
Our eight-legged friend, he is our only clue.

The hints also remind me of this Stackoverflow answer because

Parsing HTML with regex is sometimes know as "The Call of Cthulhu".

Answer 2

Well, it's the Dread Lord

since you can't say its name

No, really, you can't say it at all. The human throat is incapable of making the requisite noises and 'Cthulhu'—(inexplicably glossed by Lovecraft as "khlûl'-hloo": /'qlʊlhluː/ or /'xlʊlhluː/—is merely an approximation. (The Old Ones themselves don't even speak vocally; they use transmitted thought.) The clue "I can't say... it... or I risk death" is a misattribution of Lovecraft's description of the dread name Azathoth. There's a bit in "The Call of Cthulhu" where the spells which hold the Old Ones in check need to be undone by others (their human cultists), but that can't involve actually saying their names correctly since... y'know... we can't.

and electronics are no good in its presence

This isn't really canon since the ships that land on Rlyeh don't have any problems with their radios or with getting its coordinates but "The Whisperer in Darkness" does say that Cthulhu and his kind have their electrons all wrong.

and it's worse than Hitler

He wants a general genocide of all noncultists, not just a 'ethnic cleansing'.

and the sun is at risk

"The Whisperer in the Dark" implies star-born Cthulhu was responsible for the (super)novae of half the stars.

and an eight-legged friend is a clue

There is no octopus friend of ours but images and spawn of Cthulhu are described as having "octopus-like" heads; Cthulhu himself is said to have an "awful squid-head with writhing feelers". He's usually given an octopoid head with a variable number of tentacles.

and there's Z̆͋̂̈́aͮͣ͑̐͆ͦ̂lͨ̔ͩ̽̀̉̉̎͂͆͌ͩ̚g͂̽̒̇̔o͒ͥ͊̑͑͒̽ͬ̌͆̓ͣ̚ tĕ̆̈́͒ͥ̈́ͦ̒͒ͦx̃̊̋͂̔̋ͥ͊́̿ͭͫ͐ͩẗ́̓̍ͣ̀͆͌̐̓̈̇̈̂ͫ̾͋̌ in the extra clues.

which got their name from a SomethingAwful knock-off of the Cthulhu mythos.

On the other hand,

There is no actual acrostic. The letters OONYYWTO have nothing to do with Lovecraft's mythos even if you imagine it's an anagram. It'd be very clever if the poem had an octametric clue (even if that's eight feet, not eight legs) or had something to do with the old Chinese baguwen, but that's not the case. @cpcodes saw that the first four lines' third words are, "dreaded, they cannot die" but 3/3rd has nothing to do with anything and the next four lines have nothing sensible in them. The first four lines have 10 feet each, but the next four go 8, 9, 11, 11. That also doesn't seem to have any reason.

It's probably not OP's fault, though. Cthulhu is known to scramble the brains of those who think about him too much.

Answer 3

Is it

some kind of virus?

since

the text in clues got corrupt look like it has been affected by some kind of virus. the riddle tells us it is strewn etc.

and cephalopod clue is for

cephalopods are immune against viruses and vaccinations are useless for them OR some viruses do look like cephalopods

this may be incorrect or lacking of course but I wanted to give my guess a shot