This is probably my best work yet. [Graverobber Archetype]

[SephirothKirby]

Graverobber - Dawn [DARK]

LV3

[Warrior/Effect]

When this monster is sent to the Graveyard, it is sent to your opponent's Graveyard. Then, the opponent shuffles their Graveyard. During each player's Standby Phase, replace the card above this card with this card. When this is the top card of your opponent's Graveyard, remove it from play. If you control a "Graverobber" monster, add 1 card from their Graveyard to your hand.

ATK/ 1500 DEF/ 500

 

Graverobber - Dusk [DARK]

LV3

[spellcaster/Effect]

You can Tribute this monster to add 1 Trap Card that was used while this card was face-up on the field from your opponent's Graveyard to your hand. You can use this effect during either player's turn.

ATK/ 1500 DEF/ 1300

 

Graverobber - Twilight [DARK]

LV4

[spellcaster/Effect]

When this card destroys a monster as a result of battle, select 1 card that shares one of the words in the name of that monster other than "the", "a", or "of" and in the opponent's Graveyard, other than the destroyed monster. Then, add it to your hand.

ATK/ 1700 DEF/ 200

 

Graverobber - Midnight [DARK]

LV4

[Warrior/Effect]

When this card inflicts Battle Damage to your opponent, select 1 monster in your opponent's Graveyard with ATK equal to or less than the amount of Battle Damage inflicted. Then, add that card to your hand.

ATK/ 1400 DEF/ 1500

 

Graverobber - Sunrise [DARK]

LV2

[Fiend/Tuner]

When this card is Summoned, remove from play cards in your opponent's Graveyard equal to the number of other "Graverobber" cards you control.

ATK/ 1350 DEF/ 1400

 

Graverobber - Nightfall [DARK]

LV5

[Fiend/Synchro/Effect]

1 "Graverobber - Sunrise" + 1 or more non-tuner monsters

Once per turn, you can discard 1 card that was originally controlled by the opponent to destroy 1 card on the field and remove it from play. When this card is destroyed and sent to the Graveyard, you can add 1 face-down card from your opponent's Graveyard to your hand.

ATK/ 1900 DEF/ 1700

 

Graverobber - Eternal Darkness [DARK]

LV8

[Fiend/Effect]

This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by Tributing 2 "Graverobber" monsters you control. During your Draw Phase, you can add the top card of your opponent's Graveyard to your hand instead of conducting your normal draw. When this card would be destroyed by a card effect that doesn't target, remove from play 3 "Graverobber" monsters in your Graveyard to negate the activation of that card, and add it to your hand.

ATK/ 2900 DEF/ 2500

 

Graverobber's Grudge

[Quick-Play Spell]

Destroy 1 "Gravekeeper" card or "Necrovalley" on the field. Then, draw 1 card.

 

Immortal Graverobber

[Normal Trap]

Activate if you control a "Graverobber" monster, and by paying 1,500 Life Points - 500 x the number of "Graverobber" monsters you control. Add 1 Spell Card from your opponent's Graveyard to your hand.

 

Stolen Riches

[Normal Spell]

Discard 1 card from your hand that was originally controlled by the opponent. Draw 2 cards.

 

Hiding in the Graveyard

[Counter Trap]

Negate the activation of a Spell Card, Trap Card, or Effect Monster's effect that targets a face-up "Graverobber" monster, and destroy that card. By discarding 1 card, you can add that card to your hand.

 

Graverobber's Cemetary of Mist

[Field Spell]

All "Graverobber" monsters you control gain 500 ATK and DEF. While you control a "Graverobber" monster, cards destroyed by battle involving "Graverobber" monsters and cards destroyed by your card effects are sent to the Graveyard face-down. Only the controller of this card may look at those cards. When this card is destroyed, flip all face-down cards in the Graveyard face-up.

[Akira]

Brilliant set overall, only a few minor balance changes that I've discussed with you already but overall I love them.

[~Oleon~]

...nice one...

[.Leo]

some OCG errors like tributing-Tributing. it looks really cool to me =D

[SephirothKirby]

Bumping this up.