This is a parody and non-canonical to the main story trust me on that one.
In the castle decorated with adornments, hollies and a huge tree fitted with Christmas lights of the lanterns and a golden star and inside is a fireplace blazing and with most of the Sentinels are in the holiday spirit.

[There should be a GIF or video here. Update the app now to see it.]

war_gamer
Stryker don his Military Uniform as he has stamped antlers on his helmet a bit with a smile.

"On the first day of Christmas My True Love gave to me!...........A crewman in a Persing!!"

__________Verse 2_____________

Malcolm his Vietnam uniform as his helmet don words of 'Ho Ho Ho!' With Stana markings and in his helmet band is a candy cane on his side and half of it in his mouth as if a cigarette.

"One the second day of Christmas My True Love gave to me........Two Shotgun Shells!!"

Both:
"And a crewman in a Persing!!"
__________Verse 3_____________
Storyteller-Maverick
Alistair who is wearing his pinstripe suit don green and red instead of the usually colors as he sports his signature smirk.

"One the third day of Christmas My True Love gave to me.........Three sets of Spurs!!"

Malcolm:
"Two Shotgun Shells!!"

All three:
"And a crewman in a Persing!!"
__________Verse 4_____________
snakeinmypants625453
Connor with his uniform and sports a red bandana with a red nose of Rudolph and his eyes are cloaked in shadows.

"On the fourth day of Christmas My True Love gave to me......Four Dance Hall Girls!!"

Alistair:
"Three sets of spurs!!"

Malcolm:
"Two Shotgun Shells!!"

All 4:
"And a crewman in a Persing!!"
__________Verse 5_____________
Cybertron343
Captain Infinity with a captain cap with holly plant in the front as he got a candy cane shaped cutlass as he smiled at the season.

"On the fifth day of Christmas My True Love gave to me...........Five Golden Coins!!!!"

Connor:
"Four dance hall girls!!"

Alistair:
"Three sets of spurs!!"

Malcolm:
"Two Shotgun Shells!!"

All 5:
"And a crewman in a Persing!!"

__________Verse 6_____________
Calvin with his uniform drab in green variant with fake elf ears as he sports a smile

"On the sixth day of Christmas My True Love gave to me...........Six Purple Hearts!!"

Infinity
"Five GOLDEN COINS!!!"

Connor:
"Four dance hall girls!!"

Alistair:
"Three sets of spurs!!"

Malcolm:
"Two Shotgun Shells!!"

All 6:
"And a crewman in a Persing!!"
__________Verse 7_____________
Tokawa734
Valakit with white polar bear hide almost covered in dried blood a bit as he sports a smile and raised his axe a bit

"On the seventh day of Christmas My True Love gave to me........Seven Severed Limbs!!"

Calvin:
"Six Purple Hearts!!"

Infinity
"Five GOLDEN COINS!!!"

Connor:
"Four dance hall girls!!"

Alistair:
"Three sets of spurs!!"

Malcolm:
"Two Shotgun Shells!!"

All 7:
"And a crewman in a Persing!!"

__________Verse 8_____________
bielby3847
Dom Who is wearing a winterized variant of his uniform came in and cough and clear his throat.

"On the Eight day of Christmas My True Love gave to me.....eight case of Tea!!"

Valakit:
"Seven Severed Limbs!!"

Calvin:
"Six Purple Hearts!!"

Infinity
"Five GOLDEN COINS!!!"

Connor:
"Four dance hall girls!!"

Alistair:
"Three sets of spurs!!"

Malcolm:
"Two Shotgun Shells!!"

All 8:
"And a crewman in a Persing!!"

__________Verse 9_____________
computerboy64
Heibei with his uniform all covered in a ghille suit of Holly's who sport the same expression

"On the ninth day of Christmas My True Love gave to me.... Nine Sword-a-Slashing!!"

Dom:
"Eight case of tea!!"

Valakit:
"Seven Severed Limbs!!"

Calvin:
"Six Purple Hearts!!"

Infinity
"Five GOLDEN COINS!!!"

Connor:
"Four dance hall girls!!"

Alistair:
"Three sets of spurs!!"

Malcolm:
"Two Shotgun Shells!!"

All 9:
"And a crewman in a Persing!!"
__________Verse 10_____________
Z-Warrior
Mikhail Who sport a more traditional hat as he was leaning against the tree sporting a indifferent look.

"On the tenth day of Christmas My True Love gave to me......Ten Molotov's"

Heibei:
"Nine Swords-a-slashing!"

Dom:
"Eight case of tea!!"

Valakit:
"Seven Severed Limbs!!"

Calvin:
"Six Purple Hearts!!"

Infinity
"Five GOLDEN COINS!!!"

Connor:
"Four dance hall girls!!"

Alistair:
"Three sets of spurs!!"

Malcolm:
"Two Shotgun Shells!!"

All 10:
"And a crewman in a Persing!!"
__________Verse 11_____________
RedImperium
Kazuyuki who wore his uniform as he sports bells on his chest as he lay stoic as ever a bit doing something for the western world's variant of the song.

"On the eleventh day of Christmas My True Love gave to me.....eleven cannons fire!!"

Mikhail:
"Ten Molotov's"

Heibei:
"Nine Swords-a-slashing!"

Dom:
"Eight case of tea!!"

Valakit:
"Seven Severed Limbs!!"

Calvin:
"Six Purple Hearts!!"

Infinity
"Five GOLDEN COINS!!!"

Connor:
"Four dance hall girls!!"

Alistair:
"Three sets of spurs!!"

Malcolm:
"Two Shotgun Shells!!"

All 11:
"And a crewman in a Persing!!"
__________Verse 12_____________
Waifumaster420
Hedwig sports a Christmas scarf wrapped around his neck as he smirks with his arms behind his back.

"On the twelfth day of Christmas My True Love gave to me..... Twelve Filthy Schweinhunds"

Kazuyuki:
"Eleven cannons fire!!"

Mikhail:
"Ten Molotov's"

Heibei:
"Nine Swords-a-slashing!"

Dom:
"Eight case of tea!!"

Valakit:
"Seven Severed Limbs!!"

Calvin:
"Six Purple Hearts!!"

Infinity
"Five GOLDEN COINS!!!"

Connor:
"Four dance hall girls!!"

Alistair:
"Three sets of spurs!!"

Malcolm:
"Two Shotgun Shells!!"

All of them:
"And a crewman in a Persing!!"

The Sentinels hold the note with the first early singers cough and choke widely as other hold it for them a bit before they stop and watch the audience consist of elves and most of the allied races who all clipped and cheered at the performance.

"Thank god that's over...."

"Yeah for a second I felt like losing my breath a bit......"

"Fuck off I have to sing a bit longer than you!!!"

"It's your choice of picking it you should have pick the other"

"Well than fuck I didn't get the part remember!!"

"Yeah right...."

"Come on its Christmas it's unfortunate of not celebrating it back home at least we made the best of it here so let's just calm down and enjoy...."

"Yeah.."

And so the Sentinels begin to enjoy the feeling of Christmas with the locals of the world with drinks, laughs and a bit of mistletoe from here and there. And so began the night where a certain man riding a sleigh with flying reindeers through the night with the occasional.

"HoHO HO!!! MERRY CHRISTMAS!!!"

It's a Christmas non-canon musical for all of you thank you for all the time you have I'm really grateful for it.

Enjoy the holidays.