Skull Servant to the King (Genesys)

You can understand the engine in this deck pretty quickly and easily, but I will try to explain briefly.

Eldlich: Send it to the graveyard or Special Summon with Eldixir of Scarlet Sanguine.Than constantly recycle with set cards (can banish Eldlich traps to set another Eldlich trap from deck) from the graveyard.

Skull Servant: Put as many cards as possible into the grave with cards like Grass is Greener, Wightbaking, Wightlord, and Whitprince (Dumps lots of cards to the graveyard).

Most of the cards I haven't mentioned have the effect of sending cards from deck to graveyard or are back-up boss monsters.