I like the idea of a Skull Servant Xyz monster

And somebody from YCM was doing it wrong, so...

Legion of Wight
DARK
Zombie/Xyz/Effect
R1/300/200
3 Level 1 Monsters
This card gains 700 ATK and DEF for each XYZ material. While this card has no Xyz Material and/or while this card is in the Graveyard its name is treated as "Skull Servant". Once per turn: you can detach an Xyz Material from this card to activate one of the following effects:
~Send a DARK Zombie-type monster from your deck to the Graveyard.
~Add a Level 1 DARK monster from your Deck to your hand.

I like it, but I think it needs a companion:

Skull Stream
DARK
Zombie/Xyz/Effect
R1/300/200
2 level 1 Zombie-Type monsters
During your End Phase, Special Summon 1 'Skull Servant' that has been banished or is removed from play. Once per turn during your End Phase, Special Summon 1 of this card's Xyz materials.

This card turns 2 Skull Servants in any position into 2 Skull Servants in Defense, plus an extra part of a wall which has a chance to generate 2 more next turn. A bit of swarm, but no stupid OTKs or anything because End Phase.

Even then, it'd be harder IMO to pull an OTK considering you're summoning Skull Servants.

BoC wrote:Even then, it'd be harder IMO to pull an OTK considering you're summoning Skull Servants.

This is true, but something which summons its own materials instantly is just screaming, "someone find a loop for me!"

I love swarming skull servents, no one expects a 300 ATK monster to carry over enough firepower to blow away just about anything. I like this idea for the XYZ, it gives a bit of combo to the very rigid slow playstyle.