You know what? Screw it. I'm just going to make something silly.

[Toffee.]

Comically Super-Giant, Robo Action-Walker - Deluxe
EARTH / Level 12
[Machine/Effect]
Must first be Summoned(from your Hand) by Discarding 3 other "Powercore" monsters, and cannot be Summoned by other ways. The Summon of this card cannot be negated. This card is unaffected by the effects of Spell, Trap, and other monster effects. As long as this card remains Face-up on the field, there is no limit to the number of cards in your Hand. This card can only declare an attack, change it's battle position, or activate any of it's effects, if you discard a "Powercore" monster first. If this card destroys an Opponent's monster as a result of battle: Draw 2 cards. Once per turn, you can Target 1 card on the field: Destroy it. During each of your End Phases, either decrease the ATK of this card by 1000, Discard 1 "Powercore" monster, or destroy this card.
ATK / 5000 DEF / 5000

Powercore Sparkplug
LIGHT / Level 1
[Thunder/Effect]
When this Summoned: Add to your Hand 1 "Powercore" monster from your Deck. If this card is destroyed by your Opponent's card(either by battle or card effect): Add to your Hand up to 2 "Powercore" monsters from your Deck.
ATK / 0 DEF / 0

Powercore Bulb
LIGHT / Level 1
[Thunder/Effect]
During the End Phase of a turn in which this card was Normal Summoned: Add to your Hand up to 3 "Powercore" monsters from your Deck.
ATK / 0 DEF / 0

Powercore Wisp
LIGHT / Level 1
[Thunder/Effect]
FLIP: Add to your Hand up to 2 "Powercore" monsters from your Deck. If this card is destroyed as a result of battle, after it was Flipped Face-up: Add this card to your Hand, from your Graveyard.
ATK / 0 DEF / 0

Powercore Solar
LIGHT / Level 1
[Thunder/Effect]
You can Discard this card: Add to your Hand up to 2 "Powercore" monsters, except "Powercore Solar" from your Deck. This effect of "Powercore Solar" can only be activated once per turn.
ATK / 0 DEF / 0

Powercore Drive
LIGHT / Level 1
[Thunder/Effect]
If this card is destroyed as a result of battle, Target up to 4 "Powercore" monsters in your Graveyard: Add them to your Hand. You can Discard this card and Target 1 "Powercore" monster in your Graveyard, except "Powercore Drive": Add it to your Hand.
ATK / 0 DEF / 0

Gigantic Battle Playground - Limited Edition
Spell / Field
When this card is activated, you can Discard 2 "Powercore" monsters: Add to your Hand 1 "Comically Super-Giant, Robo Action-Walker - Deluxe" from your Deck. Instead of conducting your Draw Phase, you can add to your Hand 1 "Powercore" monster instead. Once per turn, if a Machine-Type monster you control destroys an Opponent's monster as a result of battle: Inflict 1000 damage to your Opponent. Each time you Normal Summon a Level 1 Thunder-Type monster: Gain 500 Life Points. If this card is removed from the field: The Opponent draws 3 cards.

Powercore Collective
Spell
Tribute 1 "Powercore" monster that was Normal Summoned this turn: Add to your Hand up to 3 "Powercore" monsters from your Deck. The Opponent must control at least 1 monster to activate and resolve this effect.

Powercore Scramble
Trap
Target 2 "Powercore" monsters in your Graveyard: Add them to your Hand.

Powercore Surge
Trap
Target 5 "Powercore" monsters in your Graveyard: Return the Targetsto the bottom of your Deck. Then, Draw 2 cards.

I'll be willing to fix anything, in case I accidentally overdid it.