This card isn't exactly meta, but all things considered it seems like a fun thing to build a turbo deck around, much like the successful rainbow neos turbo deck.
Crimson Nova Trinity the Dark Cubic Lord
Level 10 / Dark / Fiend / Fusion
4500 attack / 3000 defense
Fusion Materials: 3 x "Crimson Nova the Dark Cubic Lord"
Must be Fusion Summoned with the above Fusion Materials and cannot be Special Summoned by other ways. Cannot be targeted, or destroyed by, your opponent's card effects. When this card declares an attack: Halve your opponent's LP. When this card destroys a monster by battle: You can activate this effect; this card can make a second attack during this Battle Phase. If you take effect damage: Inflict damage to your opponent equal to the damage you took.
Crimson Nova the Dark Cubic Lord
Level 10 / Dark / Fiend
3000 attack / 0 defense
Cannot be Normal Summoned/Set. Must be Special Summoned ( from your hand ) by revealing 3 other "Cubic" cards in your hand with different names, and cannot be Special Summoned by other ways. Unaffected by other monsters' activated effects, whose original ATK is 3000 or less. When this attacking card destroys a monster by battle: You can activate this effect; this card can make a second attack during this Battle Phase. During your End Phase: Each player takes 3000 damage. You can only use this effect of "Crimson Nova the Dark Cubic Lord" once per turn.
Spell - Normal
Target 2 DARK monsters with 0 DEF in your GY; add those targets to your hand.
A Hero Lives
Spell - Normal
If you control no face-up monsters: Pay half your LP; Special Summon 1 Level 4 or lower "Elemental HERO" monster from your deck.
Elemental HERO Prisma
Level 4 / Light / Warrior
1700 attack / 1100 defense
Once per turn: You can reveal 1 Fusion Monster from your Extra Deck, then send 1 of the Fusion Materials whose name is specifically listed on that card from your Deck to the graveyard; this card's name becomes the sent monster's until the End Phase.
King of the Swamp
Level 3 / Water / Aqua
500 attack / 1100 defense
This card can be used as a substitute for any 1 Fusion Material whose name is specifically listed on the Fusion Monster Card, but the other Fusion Material(s) must be correct. You can discard this card to the graveyard: add 1 "Polymerization" from your Deck to your hand.
Fusion Recycling Plant
Spell - Field
Once per turn: You can discard 1 card; add 1 "Polymerization" from your Deck or Graveyard to your hand. Once per turn, during the End Phase: you can target 1 monster in your Graveyard that was used as a Fusion Material for a Fusion Summon this turn; add it to your hand.
Duza the Meteor Cubic Vessel
Level 4 / Light / Machine
1600 attack / 1600 defense
If this card is Normal or Special Summoned: You can send 1 "Cubic" card from your Deck to the Graveyard. once per turn, during either player's turn, if a monster was sent to your graveyard this turn while this card was face-up on the field: You can make this card gain 200 ATK for each monster with a different name in your Graveyard, until the end of this turn.
Foolish Burial Goods
Spell - Normal
Send 1 Spell/Trap Card from your Deck to the Graveyard. You can only activate 1 "Foolish Burial Goods" per turn.
Spell - Continuous
When this card is activated: You can target 1 "Cubic" monster you control, except "Vijam the Cubic Seed"; send any number of "Vijam the Cubic Seed" from your hand and/or Deck to the Graveyard, then that monster gains 800 ATK for each ( even it this card leaves the field ). During your opponent's turn, if "Vijam the Cubic Seed" is Special Summoned by the effect of a "Cubic" monster: Send this card to the Graveyard, and if you do, halve your opponent's LP. You can banish this card from your Graveyard; add 1 "Cubic" monster from your Deck to your hand.
4500 attack is nothing to sneeze at. Listing Crimson Nova specifically as a fusion material gives you access to fusion conscription, king of the swamp, and elemental hero prisma for searching out the materials. Recurring Nightmare allows you to add back 2 Crimson Novas from the graveyard, since he has 0 defense, and can make for good discard fodder for Fusion recycling plant, twin twisters, and other such cards that can help you gain advantage or set up your plays. The burn effect is pretty nice, especially since trickstars are doing pretty well right now. Halving your opponent's life whenever you attack is always good. Not be able to be targeted or destroyed by card effects is good against true dracos, since all of their effects target. Duza and foolish burial goods can dump cubic karma to the graveyard, which can be banished to search out Crimson Nova, all good ways to keep getting to either simply Crimson Nova or Crimson Nova Trinity.
It wouldn't be the most competitive, but could you build a more rogue / casual deck around Trinity? He seems kinda like a fun counter to the current meta.