This will be the largest section, with five Level 3 monsters and seven Level 4 monsters.
Dark Irregular - Cursed Doctor - 9966601
When a card or effect is activated that targets a "Dark Irregular" Xyz Monster(s) you control (Quick Effect): You can attach this card from your hand to that monster, and if you do, this turn, that monster is unaffected by effects that target it. You can only use this effect of "Dark Irregular - Cursed Doctor" once per turn. A "Dark Irregular" Xyz Monster with this card as material gains this effect. ● Once per turn, during your End Phase: You can target 1 of your "Dark Irregular" monsters that is banished or in your GY; attach it to this card as material, then gain 100 LP for each material attached to this card.
Dark Irregular - Hysteric Shirley - 9966605
If you Xyz Summon a DARK Xyz Monster with 5+ materials attached to it: You can add this card from your GY to your hand. You can discard this card; activate 1 of these effects. You can only use each effect of "Dark Irregular - Hysteric Shirley" once per turn. ● Add 1 "Dark Irregular" monster from your Deck to your hand, except "Dark Irregular - Hysteric Shirley". ● If you control a "Dark Irregular" Xyz Monster: Draw 2 cards, then attach 1 card from your hand to a "Dark Irregular" Xyz Monster you control as material. If you cannot, discard 1 card instead.
Dark Irregular - Nightmarch Rabbit - 9966606
When a "Dark Irregular" monster is targeted for an attack (Quick Effect): You can discard this card, then target the attacking monster; negate the attack, then draw 1 card. When a "Dark Irregular" card is targeted by a card effect (Quick Effect): You can banish this card from your GY; negate that effect, and if you do, destroy that card.
Dark Irregular - Smiling Succubus - 9966608
(Quick Effect): You can Tribute this card from your hand or field, then target 1 "Dark Irregular" monster you control; it gains ATK equal to this card's original ATK (if it was Tributed from the hand) or to the ATK it had on the field (if it was Tributed from the field). If a "Dark Irregular" monster you control would be destroyed or banished by a card effect, you can banish this card from your GY instead. You can only use each effect of "Dark Irregular - Smiling Succubus" once per turn.
Dark Irregular - Werluchs Gefreiter - 9966611
When a "Dark Irregular" monster battle: You can discard this card from your hand, then target that monster; until the End Phase, it gains 1000 ATK, also double any battle damage from battles involving that target and an opponent's monster. A monster can only be targeted by this effect of "Dark Irregular - Werluchs Gefreiter" once per turn.
Dark Irregular - Dedicated Succubus - 9966602
If you control a "Dark Irregular" monster, except "Dark Irregular - Dedicated Succubus": You can Special Summon this card from your hand in Defense Position. When this card is Normal or Special Summoned: You can add 1 "Dark Irregular" card from your Deck to your hand. You can only use each effect of "Dark Irregular - Dedicated Succubus once per turn. A DARK Xyz Monster that has this card attached to it as material gains this effect.
● Once per turn, if this card would be destroyed by battle, it is not destroyed.
Dark Irregular - Doreen the Thruster - 9966603
"Dark Irregular" Xyz Monsters you control gain 100 ATK for each material attached to them. You can detach 1 material from a "Dark Irregular" Xyz Monster you control; Special Summon this card from your hand. (Quick Effect): You can banish this card from your GY, then target 1 "Dark Irregular" Xyz Monster you control; until the end of this turn, monsters you control gain ATK equal to the number of materials attached to that target x 100. You can only use each effect of "Dark Irregular - Doreen the Thruster" once per turn.
Dark Irregular - Gwynn the Ripper - 9966604
When this card is Summoned: Attach the top card of your Deck to 1 "Dark Irregular" Xyz Monster you control as material, then, if that monster has 6 or more materials, until the End Phase, it gains the following effect:
● Once per turn (Quick Effect): You can detach 1 material from this card, then target 1 monster your opponent controls; destroy it.
Dark Irregular - Obstacle Offender - 9966607
If a card is attached to a "Dark Irregular" Xyz monster you control by a card effect: You can Special Summon this card from the GY (if it was there when you attached) or hand (even if not) in Defense Position. You can only Special Summon "Dark Irregular - Obstacle Offender" this way once per turn. You opponent cannot target "Dark Irregular" monsters you control with attacks or card effects, except this card. Once per turn, during the Battle Phase (Quick Effect): You can double this card's DEF, but destroy it during the End Phase.
Dark Irregular - Vroukalakas - 9966609
If you Summon a "Dark Irregular" monster (except during the Damage Step): You can Special Summon this card from your GY in Defense Position. If this card you control is destroyed and sent to your GY: You can target 1 "Dark Irregular" Xyz Monster you control; attach the top card of your Deck to that target. You can only use each effect of "Dark Irregular - Vroukalakas" once per turn. A DARK Xyz Monster with this card as material gains 500 ATK during your Battle Phase only.
Dark Irregular - Werbear Verfolger - 9966610
When this card attacks: You can attach the top card of your Deck to a "Dark Irregular" Xyz Monster you control, then this card gains 300 ATK for each material attached to that card. If a DARK Xyz Monster you control battles: You can attach this card from your hand or field to it as material, and if you do, that monster gains 100 ATK for each material attached to it. You can only use 1 "Dark Irregular - Werbear Verfolger" effect per turn, and only once that turn.
Dark Irregular - Werwolf Freiwilliger - 9966612
If this card is Normal or Special Summoned: You can send 1 "Dark Irregular" monster from your Deck to your GY, and if your do, add 1 "Dark Irregular" card from your Deck to your hand. (Quick Effect): You can target 1 "Dark Irregular" Xyz Monster you control; attach this card from your hand or field, to it as material, and if you do, it gains 1000 ATK until the end of this turn. You can only use each effect of "Dark Irregular - Werwolf Freiwilliger" once per turn.