Erza vs Rustyrose
Just like Rustyrose said, Erza's Magic is useless towards someone who can neutralize it.
Requip: The Knight is a Caster Magic and a type of Requip and Spatial Magic.
This Magic allows the user to store weapons and armors in pocket dimensions and summon them during battle. This gives the user a high level of offense, defense, flexibility, and variety in combat, regarding the type of armor and/or weapon they Requip.
This type of Requip also gives the user the ability to use, and gain resistance to, natural elements through the use of certain armors, as seen by Erza's resistance against fire with her Flame Empress Armor, against water with her Sea Empress Armor, and against lightning with her Lightning Empress Armor.
The most prominent user, Erza, stated that there is a limit to how much the pocket dimension can store, and as a result, she leaves some of her armors in her room in Fairy Hills.
Of course, this is not important, what is most important is Rustyrose Magic: Arc of Embodiment.
Arc of Embodiment is a form of Lost Magic that allows the caster to materialize, and subsequently use to their every whim, anything they can imagine.
Any of their creations give them great versatility both in and out of combat. They can range anywhere from everyday objects and weapons to more complex creations, even living ones, or even simple images of whatever may be on the user's mind.
These creations are also given special properties that go according to what they are. It has been stated that there are several limits and conditions to this Magic, one of which is that the Magic cannot conjure living creatures.
Despite this, Arc of Embodiment has been considered an invincible Magic by its caster, who additionally claims that nothing can beat the Magic.
A nemesis of any Item Base Magic like "The Knight".
"I did not expect that the Fairy Queen would be so weak." Rustyrose arrogantly said.
"I finally get it, so you can create any anti-weapon to counter me, but there's a problem, what if you can't find an item on your mind that can counter my item?" Erza said while equipping her every day's armor.
"Weapons that I don't know? That's impossible, I spend years and years searching for different magic and weapons, it's impossible for me to not know every type of weapon." Rustyrose said.
"Then try to counter this."
Erza takes a sword from his spatial pocket and holds it in front.
An ordinary katana with any magic whatsoever at all.
"Swordsmanship? Do you want me to defeat using only swordsmanship? That's impossible, I can recreate a huge cannon to blast you."
"Ordinary weapon? Let's see."
"Cut! Blood Rain!"
Erza's sword turns into a blood sword, a blood that resembles a sword that is made from scarlet blood.
He then points her sword towards Rustyrose and commands.
"Blood Boil"
Rustyrose suddenly felt his body starting to get hotter and hotter until smoke started to come out from his skin.
"What kind of magic is this?!"
"Anti-Magic Armor!"
A golden armor appeared on his body but still the head from his body did not disappear.
"Ice Armor!"
Another blue-colored armor appeared that released the freezing cold effect but it did not stop the heat at all.
"What kind of magic is this!"
"Did you say you know everything? Why not try to counter it?"
"..... Cut! Blood Rain!"
A blood sword appears on Rustyrose's hands, just like Erza, his weapon resembles her weapon.
"Blood Boil"
Smoke starts to come out from Erza's body, but not like Rustyrose who looks like suffering, Erza seems fine from the intense heat.
"What's the matter? Is that all your strength?" Erza taunting said.
"Blood Boil"
"Blood Boil"
"Blood Boil"
"Blood Boil"
Rustyrose kept using the ability again and again but the effect did not work at all, he looked at the sword on his hand and felt something ain't right.
He never heard or read this kind of weapon with this kind of effect, much more a Magic that can make blood boil.
"Let's end this, you're too boring to fight." Erza then takes a stance ready to end Rustyrose.
"Y-You said boring?! Die!"
"Tower of Dingir!!"
From Rustyrose's back, a giant tower starts to come out, a strange force starts to drag Erza towards the tower but her strength can easily repel the pulling force.
"Sword of Blood: Hundred Executioner Sword"
As Erza waves her sword in a circular motion, countless crimson colored swords start to materialize around her.
She then pointed it forward.
"Dazzling Scarlet Blood"
Swish!
In an instant, all the crimson swords stab Rustyrose and the tower destroys everything around.
Looking at her opponent who is being sealed by the countless swords, Erza finally takes her weapon back and starts to walk back only to see Mira trying to lure her father.
"Damn you thieving cat!!"