black luster soldier yugioh deck YU-GI-OH! - Soldier of Chaos - BLC1-EN002 - Secret Rare A single individual card from the Yu Black Luster Soldier Deck Breakdown

Suspended Duelists may not enter the Discord server of a Regional Qualifier tournament, no exceptions

Of course, even if Grand Mole had been summoned, the Hate Buster was set in Yubel's field at the time, so even if Grand Mole had been summoned, there would have been no change in the result, but this is only a consequential story and cannot be a reason for Judai not to summon Grand Mole

Even common cards like Zoma the Earthbound look like a final boss from a video game

That's not going to work

If this card is sent from the hand or field to the GY as material for the Link Summon of a "Code Talker" monster: You can either add 1 "Cynet" Spell/Trap from your Deck to your hand, or, if this card on the field was used as material, you can add 1 Level 4 Cyberse monster instead

it loses ATK and DEF equal to the banished monster's Level x 300, until the end of this turn