Do you wish to LEARN, LM? I certainly hope so, ...but WE (everyone who reads this answer) shall see...
There are four references to the second death in Revelation, only one of which corresponds to what you are saying. What you are saying completely ignores the other three verses:
So
say you... I shall display below that your CONSTRUCT of the
WORD is nothing but a PERVERSION of it:
LM said:
Revelation 2:11
“He who has an ear, let him hear what the Spirit says to the churches. He who
overcomes shall not be hurt by the
second death.”’
Revelation 20:6
Blessed and holy is he who has part in the first resurrection. Over such the
second death has no power, but they shall be priests of God and of Christ, and shall reign with Him a thousand years.
Revelation 21:8
But the cowardly, unbelieving, abominable, murderers, sexually immoral, sorcerers, idolaters, and all liars shall have their part in the lake which burns with fire and brimstone, which is the
second death.”
Answering your above references:
(1) --
Rev 2:11
The 2nd Death is
PHYSICAL... and any "overcomer" only "overcame" because
CHRIST ...
AUTHORED and FINISHED Faith IN them --
Heb 12:2 -- Gal 2:20 -- The Apostle Paul "overcame" because He submitted to
CHRIST and HIS FAITH, by DIEING to His own --...
the life I NOW LIVE in the flesh I LIVE by the faith OF ...the Son of GOD -- which was WITHIN, and thereby provided the "overcoming" FOR HIM.
Those who submit unto
CHRIST, and
DIE unto themselves --
Gal 2:20 -- are not "
hurt" by dieing in the NAKEDNESS of their FLESH as they have "bought the GOLD of
CHRIST, ...TRIED in (the Lake of)
FIRE --
Rev 3:18
It is the "
SHAME of NAKEDNESS" that IS the "
hurt" which is avoided by those
COVERED/CLOTHED in the "WHITE RAIMENT", of
CHRIST --
Rev 3:18 -- 1 Pet 4:8
(2) --
Rev 20:6
The DEATH in the PHYSICAL (2nd death, which follows the death of the 1st death which was manifest by the SOUL in breach of the command of GOD) has NO POWER over the FAITH which is
AUTHORED and FINISHED by
CHRIST... It aint that hard, LM...
(3) --
Rev 21:8
No man can escape the qualifications listed in
Rev 21:8 --
the cowardly, unbelieving, abominable, murderers, sexually immoral, sorcerers, idolaters, and all liars shall have their part in the lake which burns with fire and brimstone, which IS [not "will be"] ...the second death
THIS life
is the LAKE of
FIRE and BRIMSTONE in which the
"GOLD of CHRIST" was
tried... and IN which ALL things are JUDGED... which is
NOW! --
John 12:31 -- Rev 3:18 -- 1 Cor 3:11-15
The (Lake of)
FIRE and BRIMSTONE is actually a
SAVING and CORRECTING "fire" --
1 Cor 3:15 -- Psalm 90:9
Just a FEW (qualifications that make the 2nd death inescapable) that NO MAN can avoid:
(1) ALL men are
LIARS (which qualifies
YOU LM, even if you are able to decieve yourself by wriggling out of the others

) --
Rom 3:4
(2) ALL men are CONCLUDED by GOD in
UNBELIEF --
Rom 11:32 -- so you have 2 qualifiying achievements!
(3) If you even have ONE picture or favorite musical or entertainment artist... you are an
IDOLATOR...
There you are LM... this gives you
3 qualifying achievements by YOU which serve to include
you in the
LAKE of FIRE & BRIMSTONE =
2nd Death!
That's enough, don't want you to feel "too bad"...
Btw --- the word "
FIRE" in all these verses as well as --
Rev 3:18 --
IS the
FIRE that TRIED
CHRIST, and is --
PUR #G4442 -- Which is a
PERFECTING "
FIRE", as the
FIRE (of suffering) which
tried CHRIST was a part of His
PERFECTING --
Heb 2:10 -- and
IS the "trying" of each of us as we are being "perfected" --
James 5:3 -- 1 Pet 1:7 -- in
THIS ...the "LAKE of
FIRE and BRIMSTONE"...
LM said:
Now how is it that the second death has not power to hurt the overcomers if the second death is just Death and Hades being thrown into the lake of fire??
Read what I just said...

...if "your" works, cease to exist, and become HIS WORKS within you, then the "2nd death" (of the flesh), will not result in
SHAME, rather... the "you" that has
DIED and been
CRUCIFIED with
CHRIST --
Gal 2:20 -- is what the Father sees -- -- instead of your DESERVED SHAME of NAKEDNESS...
IOW...
YOU living the repetition of
ADAM & EVE before
YHVH --
Gen 3:7, 11 -- which is
SHAMEFULLY HIDING from RIGHTEOUSNESS instead of LIVING it...
The RIGHTEOUSNESS of DIEING to SELF, is the "HIDING" of your deeds
IN CHRIST -- which do not APPEAR before
YHVH --
Matt 10:26 -- Rom 4:7 -- -- but are covered (clothed) with His RIGHTEOUSNESS --
Rev 3:18
LM said:
You are taking into account only one context for the second death when there are clearly two contexts. The second death in Rev 21:8 is the soul death of the wicked.
There you go, making excuses again!
GOD says there are
NONE "RIGHTEOUS", (and I shall believe Him and what HE WROTE over what YOU write, any day!) btw, "
NONE" means ah, ...
NONE!
...
no ...
not ...
one 
(not even YOU, ...LM!) --
Psalm 14:1-3 -- Rom 3:10-12 -- YOU have already experienced the SOUL DEATH" for
IN THE DAY that YOU sinned, ...
you DIED --
Gen 2:17
ADAM
sinned, --
Gen 3:6 -- yet continued to LIVE a
PHYSICAL lifetime that was
930 years in length --
Gen 5:5
LM said:
The righteous (overcomers) are not hurt by this. There is no possibility that throwing Death and Hades would hurt anyone, so your context completely ignores these three verses.
Nah...

YOU ignore what
they say, as well as what
I say... you're quite good at ignoring!
As I said above, according to
YHVH GOD, there are
NONE "RIGHTEOUS" --
Psalm 14:1-3 -- Rom 3:10-12 -- and I hate to tellya, but... "
NONE" happens to INCLUDE even
YOU, LM!
DEATH and HADES (which means GRAVE) are pretty common elements in this life. One must be BLIND, ...not to see this.

...better go
"SEE" the
DIVINE "OPTOMETRIST"!
LM said:
Rev 21:8 matches up with Matthew 10:28. In Matthew 10:28 Jesus assures us that God can destroy the soul in Gehenna, which is (or contains) the lake of fire. So the death of the soul is the second death in Gehenna.
Trying to make the SCRIPTURES say what YOU wish them to say!
(1) -- There is not ONE VERSE that notes that "Gehenna" and the LAKE of FIRE are one and the same thing. That is YOUR interp...
The LAKE of FIRE also contains BRIMSTONE=Sulfur (which you IGNORE)... BRIMSTONE is a PURIFYING agent...
The word "BRIMSTONE" is #G2303 -- THEION -- which means sulfur and is derived from -- #2304 -- THEIOS -- which means DIVINE.
We
are (now)
IN the midst of GOD --
Acts 17:28 -- who IS (UNCHANGINGLY/NOW) a CONSUMING FIRE -- Heb 12:29 -- which is CORRECTIVE (removing unholiness/sinfulness from us) and a PRESERVATIVE... and a CREATOR
Certainly NOT a DESTROYER! Nor is HE (like you), a perpetrator of
FEAR --
1 John 4:18
YOU are the (misled) messenger of (your churches tainted version of)
BAD NEWS (
HELL, destruction, vengence, for anyone but YOU)... misrepresenting Him --
Matt 7:22-23 -- When He SPECIFICALLY told you to bring
GOOD NEWS --
Mark 16:15 -- and you
have been, and
are, ...
FAILING that commission... Lotsa luck widdat!
(2) More of you trying to make SCRIPTURE say what YOU want it to say... within the EMPTY and EVIL vengence within your heart for others -- Matt 10:28 -- notes that GOD, ...is
ABLE... to destroy. It
does NOT SAY that He
will EVER do so...
GOD
LOVES the
WORLD and DOES NOT CHANGE --
Mal 3:6 -- and
CHRIST died for
ALL --
1 Tim 2:6
If ALL are not saved, then the MAJORITY of His sacrifice is therefore,
IN VAIN --
Isaiah 55:11 -- which is a blatant and VAIN MISREPORTING of the ability of the
WORD of GOD to accomplish ALL that it is
SENT to DO --
John 3:16-17 -- John 1:29
Btw... Just because you own a GUN (which makes you
ABLE to kill me), ...does not mean that you
WILL kill me! And only means that the GUN en
ABLES you the power to do so...
PEACE...
...willieH