Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by sending 3 "Cubic" monsters you control to the Graveyard, and cannot be Special Summoned by other ways. If Summoned this way, this card gains 3000 ATK. This card can make a second and third attack during each Battle Phase. If this card in your possession is sent to your Graveyard by your opponent's card (by battle or card effect): You can target up to 3 "Cubic" monsters in your Graveyard; Special Summon them, then you can add 1 "Cubic" card from your Deck or Graveyard to your hand.
BUSTER GUNDIL THE CUBIC BEHEMOTH
Buster Gundil the Cubic Behemoth - Yu-Gi-Oh! Card Database - YGOPRODeck
Yu-Gi-Oh! The Dark Side of Dimensions Movie Pack - Yugipedia - Yu-Gi-Oh! wiki
Buster Gundil the Cubic Behemoth - Yu-Gi-Oh Cards - Out of Games
2020 YU-GI-Oh! the Dark Side of Dimensions Movie Pack Secret Edition TCG Cards
Cubic Deck 2022 - YGOPRO
Indiora Doom Volt the Cubic Emperor [MVP1-EN038] Ultra Rare
He's Legend rank 5 using triple D deck VS. the cubic cards ;) : r/DuelLinks
Yu-Gi-Oh! Wiki - Buster Gundil the Cubic Behemoth
Buster Gundil the Cubic Behemoth : r/DuelLinks
People say that Cubics only need a 1 or 2 more support cards to be really good, so I made some. How'd I do? : r/yugioh
My Cubic Deck List IRL