Not your regular Aigami deck, Cubic is so inconsistent in OTK thanks to Crimson Nova ridiculous requirement and needs super specific setup to boost that buffoon to OTK. This deck is using
Duza instead to establish board because it's a searchable Reborn Tengu,
just add 1 random extender and we're good to go. So we need max copies of Duza, Summoner Monk, and Foolish Burial Goods (send Karma search Duza). To maximize the advantage, we need to use compatible extender like Summoner Monk (best, summons Duza from deck), Magicians Souls (super great, dumps your useless Cubic s/t on hand and draw), Apprentice Illusion Magician (same logic, but without draw), Danger Mothman (same logic, but the hand dump is random). Also we need to max Karma (for searching Duza) and Unification (combo piece).
Combo is summon Duza + 1 extender, use Duza dump Unification, make Barricadeborg (can use its effect to dump Unification in hand, so combo is still running even if we draw it), use Unification 2nd Duza, use Duza dump 2nd Unification, make Auroradon, use Auroradon ss 3 tokens chain 2nd Unification summon 3rd Duza, use Duza dump 3rd Unification, use Auroradon tribute itself and 1 token ss Warbluran, make Phonon Pulse, make Bureido, use Bureido chain 3rd Unification, ss Shinkuro and Vijam, make Martial Metal Marcher, ss Shinkuro again, make Garden Rose, use Garden Rose add Black Garden (save it for Tzolkin requirement), make Crystal Wing, make Tzolkin using Crystal Wing (now tuner cus Marcher) + Bureido, use Garden Rose GY eff ss Crystal Wing from GY, set Black Garden use Tzolkin ss yet another Crystal Wing.
You can use Black Garden to halve opponent's monster atk, but it makes Crystal Wing miss timing against on-summon effect because Black Garden activation is mandatory. The rest of the main deck is staple while extra deck is combo pieces and generic stuff, can use more Tzolkin target if you want.
Pros: New approach for Cubic, consistent, big monster, with staple too.
Cons: Only has monster negate, lack follow-up (can include Roland for Gearfried as follow-up by replacing Phonon Pulse, but needs brick like equip and Gearfried itself).