Yu-Gi-Oh! EV - Dan's deck

Magimatician Poisson
★★★★
DARK
Psychic/Effect
ATK 1500
DEF 1300
If this card is Normal or Special Summoned: You can add 1 "Magimatician" monster from your Deck to your hand, except "Magimatician Poisson". If this card is detached from an Xyz Monster and sent to the GY to activate that monster's effect: You can attach 1 "Magimatician Poisson" from your Deck to that monster as a material. You can only use each effect of "Magimatician Poisson" once per turn.

Magimatician Gauss
★★★★
DARK
Psychic/Effect
ATK 1800
DEF 1200
If this card is Normal Summoned: You can Special Summon 1 "Magimatician" monster from your hand, except "Magimatician Gauss". If this card is detached from an Xyz Monster and sent to the GY to activate that monster's effect: You can attach 1 "Magimatician Gauss" from your Deck to that monster as a material. You can only use this effect of "Magimatician Gauss" once per turn.

Magimatician Bernoulli
★★★★
DARK
Psychic/Effect
ATK 1600
DEF 1600
If this card is Normal or Special Summoned: You can add 1 "Rank-Slide-Magic" Spell from your Deck to your hand. If this card is detached from an Xyz Monster and sent to the GY to activate that monster's effect: You can attach 1 "Magimatician Bernoulli" from your Deck to that monster as a material. You can only use each effect of "Magimatician Bernoulli" once per turn.

Magimatician Descartes
★★★★
DARK
Psychic/Effect
ATK 800
DEF 2000
When an attack is declared involving your Psychic Xyz Monster and an opponent's monster: You can Special Summon this card from your hand, then destroy that opponent's monster. If this card is detached from an Xyz Monster and sent to the GY to activate that monster's effect: You can attach 1 "Magimatician Descartes" from your Deck to that monster as a material. You can only use this effect of "Magimatician Descartes" once per turn.

Magimatician Euler
★★★★
DARK
Psychic/Effect
ATK 1900
DEF 100
If you control a "Magimatician" monster other than "Magimatician Euler", you can Special Summon this card (from your hand). If this card is detached from an Xyz Monster and sent to the GY to activate that monster's effect: You can attach 1 "Magimatician Euler" from your Deck to that monster as a material. You can only use this effect of "Magimatician Euler" once per turn.

Magimatician Pascal
★★★★
DARK
Psychic/Effect
ATK 1600
DEF 1500
You can discard 1 card; Special Summon 1 "Magimatician" monster from your hand or Deck, also you cannot Special Summon monsters for the rest of this turn, except "Magimatician" monsters. If this card is detached from an Xyz Monster and sent to the GY to activate that monster's effect: You can attach 1 "Magimatician Pascal" from your Deck to that monster as a material. You can only use each effect of "Magimatician Pascal" once per turn.

Magimatician Cauchy
★★★★
DARK
Psychic/Effect
ATK 0
DEF 1800
If this card is sent from the hand to the GY: You can Special Summon this card in Defense Position, but banish it when it leaves the field. If this card is detached from an Xyz Monster and sent to the GY to activate that monster's effect: You can attach 1 "Magimatician Cauchy" from your Deck to that monster as a material. You can only use this effect of "Magimatician Cauchy" once per turn.

Number π: Trianglarrow Soldier
★★★★
DARK
Psychic/Xyz/Effect
ATK 2500
DEF 2000
2 Level 4 DARK monsters
While this card has materials attached to it, it cannot be destroyed by your opponent's card effects. Once per turn, when this card declares an attack on a face-up monster: You can detach 2 materials from this card; until the end of this turn, this card gains ATK equal to half that monster's current ATK, and if it does, that monster's current ATK is halved.

Number e: Excaliburner
★★★★
FIRE
Psychic/Xyz/Effect
ATK 2100
DEF 2600
2 Level 4 Psychic monsters
Cannot be destroyed by battle. At the end of the Damage Step, when this card attacks an opponent's monster, but the opponent's monster was not destroyed by the battle: You can detach 1 material from this card; banish that opponent's monster.

Number φ: Goldclad Hammerer
★★★★
LIGHT
Psychic/Xyz/Effect
ATK 2600
DEF 2000
3 Level 4 monsters
If this card battles an opponent's monster, negate that opponent's monster's effects until the end of the Damage Step. Once per turn, during the Damage Step, when a Spell/Trap Card, or monster effect, is activated (Quick Effect): You can detach 2 materials from this card; negate the activation.

Number √2: Esper of the Nirvana
★★★★
LIGHT
Psychic/Xyz/Effect
ATK 2000
DEF 2000
2 Level 4 Psychic monsters
At the start of the Damage Step, if this card battles a Special Summoned monster: You can detach 2 materials from this card; destroy that monster, and if you do, inflict damage to your opponent equal to half the original ATK of the destroyed monster.

Rank-Slide-Magic Irrational Strike
Normal Spell
Target 1 face-up Psychic Xyz Monster you control; Special Summon from your Extra Deck, 1 Psychic Xyz Monster with the same Rank as that monster you control, but different name from that monster, by using it as the Xyz Material. (This is treated as an Xyz Summon. Transfer that target's materials to the Summoned monster.) During your Draw Phase, if this card is in your GY, instead of conducting your normal draw: You can add this card from your GY to your hand. You can only activate 1 "Rank-Slide-Magic Irrational Strike" per turn.

Magimatician Calculus
Quick-Play Spell
Target 1 Psychic Xyz Monster you control; detach any number of materials from it, and if you do, inflict 500 damage to your opponent for each material detached this way, and if you do that, attach this card to that target as a material. You can only activate 1 "Magimatician Calculus" per turn.

Magimatician Algebra
Continuous Trap
Activate this card by targeting 1 Psychic Xyz Monster you control; it cannot be destroyed by battle or by your opponent's card effects. When that monster leaves the field, destroy this card.