Let the rage of abandoned stuff consume you!

[{Galvantula}]

I was so bored while making these.
[spoiler= Monsters]
Abandoned Doll
DARK / Level 2 / Fiend / Effect [0 / 0]
If this card is in your Graveyard, you can banish it to Special Summon 1 "Abandoned" Monster from your Hand. You can only activate the Effect of "Abandoned Doll" once per turn.

Abandoned Robot
DARK / Level 3 / Machine / Effect [1200 / 300]
If this card is Special Summoned from your Hand, banish 1 card on the Field. This card cannot attack during the turn it is Special Summoned.

Abandoned Bird
DARK / Level 3 / Winged-beast / Effect [1400 / 200]
If this card is selected as an attack target, you can banish it to Special Summon 1 "Abandoned" Monster from your Hand. That Monster loses 500 ATK and DEF.

Abandoned Toy
DARK / Level 2 / Machine / Effect [200 / 200]
If this card is Special Summoned from your Hand, you can banish 2 cards in your Graveyard to Draw 1 card.

Abandoned Plane
DARK / Level 3 / Machine / Effect [800 / 400]
Once per turn, you can equip 1 "Abandoned" Monster to this card. This card gains 800 ATK and DEF for each "Abandoned" card equipped to it.

Abandoned Puppet
DARK / Level 1 / Fiend / Effect [0 / 0]
If you control an "Abandoned" Monster, you can Special Summon this card from your Hand. If you do, you take 800 damage. Once per turn, you can banish up to 3 cards in your Graveyard to increase the Level of this card equal to the number of cards banished, until the End Phase.
[/spoiler]

[spoiler= Spells]
Curse of Guilt
Field / Spell
If a Monster your opponent controls destroys an "Abandoned" Monster by battle, that Monster loses 700 ATK and DEF until the end of your next turn.

A New Owner
Normal / Spell
Select 1 "Abandoned" Monster in your Graveyard. Special Summon it in face-up attack position.

Return of the Owner
Normal / Spell
Select 5 of your banished "Abandoned" Monsters. Return those cards to your Deck and activate one of these Effects:
● Draw 2 cards
● Destroy 2 cards on the Field.
● Your opponent randomly discards 2 cards.
[/spoiler]

[spoiler= Extra Deck stuff]
Abandoned Action Figure
DARK / Rank 2 / Xyz / Effect [1500 / 0]
2 Level 2 Monsters.
This card gains 300 ATK for each of it's Xyz Material Monsters. Once per turn, you can remove 1 of this cards Xyz Material Monsters to return 1 Level 2 or lower banished Monster to your Graveyard and Draw 1 card.

Abandoned Scavenger
DARK / Rank 3 / Xyz / Effect [2000 / 1500]
3 Level 3 Monsters.
While this card has an Xyz Material Monster(s), it cannot be destroyed by card Effects. Once per turn, you can remove 1 of this cards Xyz Material Monsters to add 1 "Abandoned" Monster from your Deck to your Hand.
[/spoiler]

[Communityreborn]

Oh, nice archtype. May I suggest a few cards?

Abandoned Chandelire
DARK / Level 6 / Fiend / Effect [2200 / 0]
Once per turn, you can inflict 300 damage to your opponent for each card in your removed from play zone.

Abandoned A/C
DARK/ Level 6/Machine/ Effect [2200/0]
When this card is summoned, you can select one face-up monster your opponent controls. It is changed into face-up attack position and its ATK is reduced to 0, until the End Phase.

Abandoned Lamp
DARK/ Level 6 / Fiend / Effect [2200/0]
When this card is summoned, you gain life points equal to the amount of "Abandoned" monsters in your removed from play zone x300.

Abandoned Fiend
DARK/ Level 6/ Fiend / Effect [2200/0]
When this card is summoned, it gains 100 ATK for each "Abandoned" monster in your removed from play zone, until the End Phase.

Abandoned Fan
DARK/ Level 6/ Machine / Effect [2200/0]
When this card is summoned, you can return up to 2 cards your opponent controls back to their hand.

Abandoned Gargoyle
DARK/ Level 6/ Machine/ Effect [2200/0]
When this card is summoned, you can destroy one card on the field. Between battle with this card and a defence position monster whose defence is lower than the attack of this card, inflict the difference as battle damage to your opponent.

Each of these cards are splashable to your Abandoned deck, depending on what you want to do. If you're in for Battle Damage, A/C, Fiend, and Gargoyle are the ones to use. All else is for whatever else you feel like doing. It's also rather easy to summon out due to Abandoned Bird and Abandoned Doll.

It's a nice archtype, but try focusing it more around removing from play. Few decks can take on a remove-from play deck and win.