Currently in the OCG not worldwide, it is a fun deck all about summoning the dark synchro cards. Summoning different, the few ones apart from the anime have their own interesting archetypes. And as the header image suggests, competitive against mainstream extra deck boss cards.

Monsters:
Aroma Jar
Ursarctic Megapola X2
Ursarctic Megabillis X2
Ursarctic Meatanus X3
Ursarctic Micpola X3
Ursarctic Mictanus X3
Ursarctic Micbillis X3
(17)
Spells:
Terraforming
Ursarctic Slider X3
Moon Mirror Shied
Ursarctic Departure
Power of the Guardian
Ursarctic Big Dipper X2
Salvage X2
Moray of Greed
Gift Exchage
Monster Reborn
Sacred Sword of Seven Stars
(16)
Traps:
Stardust Re-Spark X2
Lost Winds X2
(4)
(40)
Extra
XYZ
Hope Harbinger Dragon Titanic Galaxy
Number 11: Big Eye
Mecha Phantom Beast Dracossack
Springans Ship – Exblowrer – Exblowrer
Number 74: Master of Blades
(5)
Synchro
Ursarctic Polari X3
Stardust Dragon
Ursarctic Grand Chariot X2
Stardust Warrior X2
Ursarctic Polari X2
(9)
Link
Luster Soldier – Soldier of Chaos
(1)
(15)
Extra
So the main cards are the extra deck dark synchros involving the deck consisting of level 7 and 8 monsters with the higher being turner monsters. Ideally one of each summons a Ursarctic Polari and if you have a monster to tribute, you can summon back a level 8 again including spells and traps and then boss cards are able to be brought to the field.
Aroma Jar in there as a level 1 works with a level 8 turner as well. Both boss monsters have two effects very offensive and useful in either drawing a card or negating destruction once per turn. Departure and Slider spells will help with this process.
Ursarctic is a fun one saving you cards tributing and potentially being able to steal your opponents’ monsters after 7 special summons form both sides.
Protection includes classic Moon Mirror Shield, Power of the Guardian, to Lost Winds, Stardust Re-Spark and Ursarctic Quit Charge.
One con tooconsider, might have to wait for an extra turn to conduct XYZ summoning.
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