The Paradox in the anime didn't use the Continuous Magic "Malefic Territory". It might be because he didn't have it, or maybe he just didn't draw it.
Youyu leans towards the latter, thinking that perhaps after their last encounter, the opponent got scared by his wind, so he urgently printed this card.
However, the "Malefic Territory" used here by Paradox certainly differs in effect from the physical card version.
All physical Malefic Monsters have a drawback, which is that only one monster with "Malefic" in its name can exist on the field at a time. But according to the second effect of the physical card "Malefic Territory", as long as this Continuous Magic exists, there can be more than one Malefic Monster on the field.
Yet the Malefic Monsters in the anime don't have this drawback, so the "Malefic Territory" here must also lack this effect.
Furthermore, the physical "Malefic Territory" has a third effect that can negate the effects of "Malefic" monsters on your field during the Battle Phase.
But that's because the effects of physical Malefic Monsters are all drawbacks—like only one Malefic Monster can exist on the field, or all other monsters cannot attack when a Malefic Monster is present.
However, the Malefic Monsters in the anime don't have the above drawbacks, so Youyu boldly speculates that the "Malefic Territory" Paradox printed here doesn't have the third effect either and wouldn't negate the effects of his Malefic Monsters during the Battle Phase.
Paradox's operation continues.
"I activate the effect of 'Malefic Rainbow Dragon' in my hand." He said calmly, "Send an 'Ultimate Crystal God - Rainbow Dragon' from the deck to the graveyard, and this card can be Special Summoned directly from the hand.
Descend, ultimate god of jewels in a sinful stance—
—Malefic Rainbow Dragon!"
A rainbow-colored storm, a surge of dark energy erupted in this closed Malefic Space. The enormous dragon soared into the sky, surrounded by seven-colored halos, unfurled its black wings, revealing a divine, godlike aura.
[Malefic Rainbow Dragon, ATK 4000]
The audience watching the live broadcast was in an uproar.
A monster with an attack power of four thousand was summoned in an instant!
Even Kaiba was a bit astonished. After all, even through the live broadcast, he could feel the unparalleled divine power contained in that sky-covering rainbow dragon.
This blond man... what on earth is he?
"Hmph." Paradox smiled, "Turn ends."
"Then I'll go first." Yusei volunteered to go first, "My turn, draw! I activate the Magic Card - Tuning. Add a 'Synchro' monster from the deck to the hand, then send the top card of the deck to the graveyard.
The card I'll add to my hand is 'Quickdraw Synchro'.
Yusei drew the automatically popped-up card from the deck, then sent the top card of the deck to the graveyard, and the deck automatically shuffled.
"Next is the effect of 'Quickdraw Synchro' in my hand. By discarding a Monster Card from my hand, I can Special Summon it directly from the hand.
Come! Tuner Monster, Quickdraw Synchro!"
Yusei discarded a card from his hand, and a short mechanical warrior resembling a western cowboy with a large hat appeared on the field, expertly drawing a revolver from its holster.
[Quickdraw Synchro, ATK 700]
"Next is the effect of 'Quillbolt Hedgehog' in the graveyard!" The card just discarded to the graveyard popped back into Yusei's hand, "When there is a 'Tuner Monster' on your field, you can Special Summon it from the graveyard.
Special Summon 'Quillbolt Hedgehog'!"
[Quillbolt Hedgehog, ATK 800]
Yusei said, "Level five Quickdraw Synchro, plus level two Quillbolt Hedgehog, tuning!
The cries that gather shall become arrows that pierce the sky, paving a radiant road!"
[5+2=7]
"Synchro Summon!" Yusei raised his arm, the white light behind him cascading down like a waterfall, "Level seven, Junk Archer!!!"
A warrior appeared in the pure white light, clad in orange-red armor, holding a light blue divine bow and nocking a sharp arrow. Behind the blue goggles were the uniquely sharp eyes of an archer.
[Junk Archer, ATK 2300]
If up until just now, players still had doubts about the identities of the two masked figures beside Youyu, now those doubts were completely gone.
Synchro Summon!
And it's Junk Archer!
No doubt, hiding under that bunny headgear is definitely a crab head!
"Crab Bro!"
"Crab Bro is my idol!"
"So the unicorn beside him is Judai, then!?"
"Oh crap, so those two NPCs in Kaiba Land earlier were Yusei and Judai?"
"What, I actually encountered them earlier? Damn, I was so close to meeting the real big shots..."
"..."
In contrast, others besides the players began to look bewildered.
What was that? How did a new monster just appear?
Can this game even be played like that?
Some people began to cast puzzled looks at Pegasus, the Father of Duel Monsters, and Pegasus looked confusedly at Kaiba, the host, while Kaiba...
...Kaiba expressed that he also very much wanted to know what was happening, damn it!
So the CEO silently narrowed his eyes and looked at Youyu, who was dueling on screen.
You↑Yu↓, after this, you have a lot to explain to me!
Yusei's turn continues,
"Activate the effect of Junk Archer!" Yusei shouted, "Once per turn, I can banish one monster on the opponent's field until the end of the turn!
I banish your 'Malefic Rainbow Dragon' from the game!"
Junk Archer drew its bow and released an arrow, transforming into a piercing light beam that spun out, hitting the body of the Rainbow Dragon directly. But the light did not shatter; rather, it caused slight ripples in the space.
A dimensional distortion occurred, and the Rainbow Dragon was immediately absorbed into the rift, disappearing from the field.
"Now there are no monsters on your field to block attacks." Yusei pointed at Paradox, "Go, Junk Archer, direct attack!"
Junk Archer drew its bow again—this time with its most destructive piercing arrow!
The arrow struck Paradox directly, exploding with a "boom," making Paradox take two steps back with his burly figure.
[Paradox, LP 12000 → LP 9700]
Paradox closed his eyes to take the impact, stood up, and nonchalantly brushed off the dust from his body, saying faintly, "No pain, no itch."
With twelve thousand life points, this damage is indeed negligible.
This might be what one calls "wearing the thickest armor to take the fiercest hit"...
"Set a card, turn end." Yusei didn't pay attention to the opponent's taunt, "During the End Phase, the monster banished by Junk Archer returns to the field in the same form."
A dimensional distortion emerged, and a massive white body returned to the field, with the sinful Ultimate Jewel God Dragon's roar echoing through the heavens!