Klank and Orbus from Zeo

[Toffee.]

Just for silliness, really...

Gadgetry Expert Klank
EARTH/Level 4
[Machine/Effect]
When this card is Normal Summoned, you can Special Summon 1 "Weaponized Orbus" from your Hand. Once per turn, you can Return 1 "Orbus Tech" card from your Hand to your Deck: Draw 1 card. If this card is destroyed(either by battle or card effect): Return it to the top of your Deck.
ATK / 1000 DEF / 2000

Weaponized Orbus
WIND/Level 2
[Machine/Effect]
If this card is Special Summoned, and you control a face-up "Gadgetry Expert Klank": You can Activate 1 "Orbus Tech" card from your Deck. The effect of "Weaponized Orbus" can only be activated once per turn.
ATK / 300 DEF / 800

Orbus Tech - Enlarging Ray
Spell
Activate by returning 1 "Weaponized Orbus" you control to your Hand and Targeting 1 Machine-Type monster you control, except "Gadgetry Expert Klank": Target monster's Level becomes 8, It's ATK and DEF are doubled, and damage done to the Opponent from battles involving that monster is also inflicted to the (original) controller of the Target monster.

Orbus Tech - Cog Fuel
Spell
Activate by returning 1 "Weaponized Orbus" you control to your Hand and Targeting 1 Machine-Type monster in your Graveyard: Special Summon the Target.

Orbus Tech - Digital Field
Spell
Activate by returning 1 "Weaponized Orbus" you control to your Hand and Targeting 1 Machine-Type monster you control, except "Gadgetry Expert Klank": Until the End Phase of the Opponent's turn, Target monster cannot be destroyed, and is unaffected by the effects of other cards.