somewhat competitive K'rrik (EDH / Commander)

this deck is heavily based on the "Razaketh suicide combo" by Enortom (link below) basically the deck is as follows

The first step is to find and play Razaketh
then sac one of the three creatures to Razaketh, then find and play Lotus Petal. It's a more reliable option than chrmoe mox not to mention cheaper.
afterwords, sacrifice the second creature to find Rain of Filth, but to make the deck as sturdy as possible, do not cast it yet.
The final step, for step one is to sacrifice the final creature and find Weaponcraft Enthusiast. Use the lotus petal to cast rain of filth and sacrifice three lands, then cast the enthusiast choosing to make the servos, giving you three more creatures to sac to Razaketh.

step 2 Sacrifice a servo to find Dark Ritual.
Sacrifice a servo to find Carnival of Souls, this is the first of our combo pieces.

Then sacrifice the enthusiast to find Reanimate.

Sacrifice your final land using rain of filth, and cast dark ritual, you now have three mana in your mana pool. Use two of that mana to cast the carnival, and finally (with your last mana) cast reanimate on the enthusiast, once more making the tokens. You will loose three life, and gain three mana off the carnival.

step 3
This is where you can generate the combo. You will either need three mana, three creatures and Carnival of Souls on the battlefield, or five mana and four creatures.
Firstly, sacrifice a servo to find Gravecrawler, and play it. We will still have three mana in our mana pool thanks to the carnival.

Secondly, sacrifice a servo to find any one mana zombie, this deck has access to Carrion Feeder, Festering Goblin and Festering Mummy. Play the zombie, you will still have three mana in your mana pool.

Were almost there, you need to sacrifice the enthusiast, to find and cast Phyrexian Altar with the final three mana you have. Now you effectively have infinite mana.

Sacrifice the gravecrawler to find either Blood Artist or Zulaport Cutthroat, and you win

Razaketh suicide combo http://tappedout.net/mtg-decks/razaketh-the-suicide-combo/