Keeper of Lost Souls
Level: 6
Attribute: Dark
Type: Zombie
Atk: 1500
Def: 1500
Effect: Whenever this card inflicts Battle Damage to your opponents life points, select and activate one of the following effects: 1)Increase your life points equal to the amount of damage your opponent recieves or 2)Special Summon any zombie-type monster from your opponents Graveyard and increase it's Atk by an amount equal to it's Def

Spirirts of the Missing Children
Level: 2
Attribute: Dark
Type: Zombie
Atk: 1000
Def: 1200
Effect: This card can only be special Summoned from your Opponents graveyard by the effect of Keeper of Lost Souls. When this card is Special Summoned in this way, you may tribute this monster to increase any Keeper of Lost Souls Atk by 1000.

Boogeyman*
Level: 4
Attribute: Dark
Type: Zombie/Spirit
Atk: 2000
Def: 200
Effect: When this card destroys a monster on your opponents sdide of the field, decrease the Atk of this card by 500 points (this continues for 4 turns). After, whenever this card inflicts damage to your opponents life points, increase the Atk of this card by 1000.

*Boogeymans effect is on top of the typical Spirt Effects (cannot be special summoned from the graveyard etc)

These are interesting, but why does the second have to be in your opponents graveyard?

PS: Rate my cards two (not the first set the second one)

because you would want the additional 1000 ATK points right? if u get three SotMC's, you have a KoLS at 4500......equal to a Blue Eyes Ultimate.