When I get some, I'm going to swap out the Llanowar Elves for Birds of Paradise.

I am making a very similar deck its this Mill Myself i have found that the mana ramp from Llanowar Elves and Dawntreader Elk just slows the deck down, you should be able to fix any mana problems using mulch. I also have found that Laboratory Maniac is just to subject to removal. I would replace these with more Kessig Cagebreakers,and add Ghoultree and Tower Geist or Armored Skaab

As I get more Kessig Cagebreakers I'll be putting them in definitely. I love the Ghoultree, but I only have one, and he's never really been a game changer for me, the Splinterfrights have been far scarier in the end. The Dawntreader Elk has saved me quite often, I rather like them. I've already got 4 Armored Skaab

Something you could throw in a Curse of the Bloody Tome. You could enchant yourself and use it to mill yourself for 2 each turn. You could also throw in a Dream Twist for a low cost 3 card mill then use the flashback to cast again. also a great mill card for the deck would be Increasing Confusion.

May I suggest play testing Jace's Archivist? Cause why not! +1

Thanks for the suggestions. I haven't put in Dream Twist because it has no other effect than to mill... All the other spells I've got in my deck mill me and do something else. Too often the mill doesn't produce creatures, in which case Dream Twist is a wasted card and mana. I do like Jace's Archivist and will probably try to find a place for him if I get one. I've thought about Curse of the Bloody Tome, while it won't always net me a creature in the graveyard, it is recurring.

Any ideas for a Sideboard would be helpful too. Thanks!

This is nice, I'd take out the 4xArmored Skaabs for 4xBlue Sun's Zenith, then I'd trade out a Mulch for a fourth Forbidden Alchemy. this is how I make a Graveyard-Slayer deck: The first Ghoultree Deck

Thanks. I think I might pull one Mulch for Forbidden Alchemy. For a while I was having mana issues, but the last several games I haven't needed Mulch as much as I did, and Forbidden Alchemy's flashback is great here.

I don't have any Blue Sun's Zenith, so I'll have to keep them in mind for the future.

Cool.

I need some help getting through the short game. Can anyone help me speed up this deck?

Sure, take out your 3xShimmering Grotto, 4xArmored Skaab, Mulch & 2xSpider Spawning for 2xDawntreader Elk, 2xViridian Emissary, 1xForest, 1xIsland, 1xSwamp, & 4xRampant Growth.

I really like Merfolk Looter in this deck. When I play with my similar deck ( http://tappedout.net/mtg-decks/gu-splinterfright-spawning-and-cage-breaking/ ) she's usually my unsung hero, filling my GY with creature cards and drawing me more self mill.

I also really like using Llanowar Elves because they can act as both a creature and a source of land. Once you Mulch yourself enough lands they become targets for Merfolk Looter.

Best of luck to you!

Has alot of potential. I would recommend having more than 24 creatures in the deck. The more creatures in the deck the more meaty the Splinterfright and Boneyard Wurm get. Also I've personally never needed more than 2 Gnaw to the Bone in my self-mill, but if you are using them when you have 3 or less creatures in the graveyard then i could see how you might need three. If you need some early defence I'd say go for AEther Adept. If you need anymore ideas, you can check out my self-mill deck. It's little different than yours but it has the same idea.deck:party-in-the-graveyard-1

That's a good point on Gnaw to the Bone. I've dropped them to 2 and upped Tracker's Instincts to 4.

I found Spider Spawning too important not to have in the mainboard. Those spiders have won me more games than anything else in the deck so far.

I think a mana dork (Birds of Paradise/Llanowar Elves) would be very good for this deck. Also Thought Scour seems great 2.

I ran Birds of Paradise and Llanowar Elves for a long time here, and it just slowed the whole thing down. I do like Thought Scour. What would you take out for it?

I'd probably cut 1 Spider Spawning and 2 Laboratory Maniac. I think the maniac is a little to situational.

Alchemist's Refuge could be really useful here.

I agree! I'm going to wait to update it for Avacyn Restored when I get some cards from it. I've seen a few cards that I think will help.

I agree that you could use more creatures to build up your Frights and Wurms more consistently. Ambush Viper and Ulvenwald Tracker are good early game cards that help me out greatly in my graveyard deck. Check out mine for some ideas Flingin' Frights