Although IV deliberately put on a composed, confident front, that was not actually the case.
In the Fusion Dimension, he was at a slight disadvantage.
One of his main trump cards, Number 15: Gimmick Puppet Giant Grinder, was actually restricted in the Fusion Dimension. Its anime effect could remove one Xyz Material to destroy all Xyz Monsters on the Field except itself, then inflict damage to each controller equal to the ATK of their destroyed monsters.
It was easy to see that this was also an "Xyz Slayer"-type effect. If the opponent used Xyz Summoning and enjoyed comboing off, with two or three Xyz Monsters on the Field at once, Giant Grinder could remove one material and instantly finish them off.
But if the opponent did not use Xyz Summoning, then aside from its general protection of "Number monsters Cannot be destroyed by battle," Giant Grinder was basically just a vanilla monster.
For that reason, Giant Grinder had been adjusted during Physical Card Adaptation to fit the real environment. Its physical card effect was that up to twice per turn, it could remove one Xyz Material to destroy one Special Summoned monster on the opponent's Field. If the destroyed monster was an Xyz Monster, it could then inflict damage equal to that monster's ATK.
One material could only destroy one monster, and it could only inflict damage if that monster was an Xyz Monster. This effect meant that while Giant Grinder was still strongest against Xyz Monsters, it also had some use against non-Xyz Monsters, making it more versatile.
Aster's Diamond Dude was destroyed, but instead, a faint smug smile appeared on his face.
"Diamond Dude can reveal and activate one Spell Card per turn, and its ATK and DEF are higher too. I fully expected you to attack Diamond