the last of the a classes

A Class - Undercover Operative
[Level 4/LIGHT/Warrior/Effect/1800/600]
When this card in your possession is destroyed by your opponent's card (either by battle, or by card effect) and sent to your Graveyard OR when this card in your Spell & Trap Zone is sent to the Graveyard: You can target 1 Set Spell/Trap Card your opponent controls; destroy it. Once per turn, you can either: Target 1 "A Class" monster you control; equip this card to that target, OR: Unequip this card and Special Summon it in face-up Attack Position. The equipped monster gains 800 ATK. If the equipped monster inflicts battle damage to your opponent: You gain LP equal to the damage inflicted. If the equipped monster would be destroyed, destroy this card instead. You can only gain this effect once per turn.

A Class - Vector Modulation
[Level 4/DARK/Machine/Effect/1700/800]
When this card in your possession is destroyed by your opponent's card (either by battle, or by card effect) and sent to your Graveyard: You can target 1 monster your opponent controls; destroy it. Once per turn, you can either: Target 1 "A Class" monster you control; equip this card to that target, OR: Unequip this card and Special Summon it in face-up Attack Position. The equipped monster loses 500 ATK, but it cannot be destroyed by card effects that do not target it, also it is unaffected by your opponent's Special Summoned monsters. If the equipped monster would be destroyed, destroy this card instead. You can only gain this effect once per turn.

A Class - Watchtower
[Level 4/LIGHT/Machine/Effect/1800/800]
Once per turn, during your opponent's Main Phase or Battle Phase, you can: Immediately after this effect resolves, Xyz Summon 1 Xyz Monster, using only this card you control and "A Class" cards that are equipped to this card (this is a Quick Effect). Once per turn, you can either: Target 1 "A Class" monster you control; equip this card to that target, OR: Unequip this card and Special Summon it in face-up Attack Position. If the equipped monster attacks a Defense Position monster your opponent controls, before damage calculation: You can destroy that monster. If the equipped monster destroys an opponent's monster by battle and sends it to the Graveyard: You can add 1 "A Class" monster from your Deck to your hand, except "A Class - Watchtower". If the equipped monster would be destroyed, destroy this card instead. You can only gain this effect once per turn.

A Class - X-Gunner
[Level 4/LIGHT/Machine/Effect/1700/600]
When this card in your possession is destroyed by your opponent's card (either by battle, or by card effect) and sent to your Graveyard: You can target 1 "A Class" monster in your Graveyard, except "A Class - X-Gunner"; Special Summon that target. Once per turn, you can either: Target 1 "A Class" monster you control; equip this card to that target, OR: Unequip this card and Special Summon it in face-up Attack Position. The equipped monster is unaffected by Trap effects. Other "A Class" cards you control that are equipped to the equipped monster cannot be destroyed by battle. If the equipped monster would be destroyed, destroy this card instead. You can only gain this effect once per turn.

A Class - Yellow Fleet
[Rank 4/LIGHT/Machine/Xyz/Effect/2400/1700]
2 Level 4 "A Class" monsters
When this card is Xyz Summoned: You can equip 1 "A Class" monster from your Deck to this card. Once per turn: You can detach 1 Xyz Material from this card, then target 1 monster your opponent controls; banish 1 "A Class" monster from your Graveyard, and if you do, the targeted monster loses ATK equal to the ATK of the banished monster. Destroy a monster if its ATK becomes 0 by this effect. "A Class" cards equipped to "A Class" monsters you control cannot be destroyed by card effects.

A Class - Zeta Squadron
[Level 4/LIGHT/Warrior/Effect/1600/300]
Once per turn, if you control no other monsters: You can Special Summon 1 Machine-Type monster from your Deck in Defense Position, except "A Class - Zeta Squadron", then equip 1 "A Class" monster from your hand or Graveyard, except "A Class - Zeta Squadron", to the equipped monster. Once per turn, you can either: Target 1 "A Class" monster you control; equip this card to that target, OR: Unequip this card and Special Summon it in face-up Attack Position. The equipped monster gains 400 ATK and DEF for each "A Class" card equipped to it. If the equipped monster would be destroyed, destroy this card instead. You can only gain this effect once per turn.