[Eliminate] The "Black Hole" Archetype (6/??)

[Eliminate]

Okay, welcome to my first set (Written or not), the "Black Hole" monsters.
The "Black Hole" Archetype are DARK monsters of various types that destroy/banish cards when a certain requirement is met, thus the name "Black Hole". I was originally going to post these in card form, but I couldn't find suitable pics for them, so I instead decided to post them here. 
Here is the "Black Hole" Archetype. More will come later on.

[center][b]Monsters[/b]
[color="orange"]
Black Hole - Graverobber
DARK / ** / Fiend/Tuner/Effect:
"[I]When this card is Summoned, Special Summon 1 "Black Hole" monster from your Graveyard (its effect is negated). When this card is used for a Synchro Summon, banish 1 card from your opponent's Graveyard.[/I]"
500 ATK / 500 DEF

Black Hole - Scarecrow
DARK / **** / Plant/Effect:
"[I]When this card is Summoned, add 1 Level 4 or lower "Black Hole" monster to your hand from your Deck. When a "Black Hole" monster is destroyed by battle and sent to the Graveyard, you can send this face-up card to the Graveyard to banish that monster.[/I]"
1500 ATK / 800 DEF 

Black Hole - Skeleton
DARK / **** / Zombie/Effect:
"[I]This card can be Special Summoned from your hand when a "Black Hole" monster is sent to the Graveyard. If this card is Special Summoned this way, it is banished when it leaves the field. By Tributing this face-up card, you can destroy 1 card your opponent controls.[/I]"
1800 ATK / 500 DEF

Black Hole - Vampire
DARK / ****** / Fiend/Effect:
"[I]If you control no monsters, this card can be Special Summoned from your hand. Once per turn, by Tributing a face-up "Black Hole" monster, inflict 500 damage to your opponent. When this card is destroyed by battle and sent to the Graveyard, banish the monster that destroyed this card.[/I]"
2200 ATK / 1500 DEF[/color]

[b]Spells[/b]
[color="green"]
Sacrifice of the Black Hole
Normal Spell Card
"[I]Tribute 1 face-up "Black Hole" monster you control. Destroy 1 Spell or Trap Card on the field.[/I]"[/color]

[b]Traps[/b]
[color="purple"]
Burial of the Black Hole
Counter Trap Card
"[I]Only activate this card when a "Black Hole" monster is destroyed by battle and sent to the Graveyard. Destroy 1 monster your opponent controls.[/I]"[/color]

[b]Extra Deck[/b]
N/A[/center]

Hope you like 'em. More will come later on. Thanks for looking!

[TCG warrior]

graverobber and skeleton are OPed
Graverobber can special summon any "Dark Hole" monster from the grave (inc. vampire or scarecrow (when scarecrow is summoned this way, you can still take 1 level 4 or lower "black hole" from your deck)).

Skeleton can special summon itself and when on the field (normal, flip or special summoned), it can easily take out the opponent's strongest monster (I think too easy).

[Eliminate]

The monster Graverobber Special Summons has its effect negated. Maybe I worded it wrong. So the effect of Scarecrow wouldn't activate. So I really don't how Graverobber is OP'ed.
Skeleton...I guess you have a point about him being OP'ed. Maybe instead of sending the top card of your deck to the grave, maybe Tributing/banishing him to activate the effect?

Also, I'm hoping for this archetype to become anti-meta. Just FYI.

[Eliminate]

Bump.

Slight update, I changed Skeleton's effect a bit. You must now Tribute him to destroy 1 card your opponent controls.

Expect more cards tonight.