Removed:
Expedition Map
Catacomb Sifter
Animate Dead

Added:
Sylvan Scrying
Necroplasm
victimize

Map for Scrying is an obvious choice, since we have better things to be doing turn 1 now, this gives us a better curve play.

Sifter.. ahh, always the bridesmaid, never the bride, comes out for a tech piece against tokens.

This last one is going to be controversial, but removing animate dead for something that nets us more dudes in the long run is what I prefer. Animate works better on an empty board, and can grab other things, but Victimize works well with Meren's ability and allows us to be net 3 creatures at the end of the turn, rather than just 2. I've come across situations in EVERY game I've played where I could use more dudes on the board, and hopefully this helps!

Removed:
Forest

Added:
Woodland Cemetery

Someone stole mine, I found another. So there! However, I worry about running too few basics, particularly since I sometimes play at tables with MLD, Mass Non-basic hate, and general non-basic hate, so I will test to see.

Removed:
Pox

Added:
Riftsweeper

This was a necessary evil for us to be able to combo out and win. Pox was used alongside Koko and Gary to help us reduce life totals and impact the board in a real way to break a combo/aggro player's lead. While it may come back in, as I LOVE it to make everyone groan and disrupt the board, we need Riftsweeper to grab back key exiled [creature] cards.

I'm eyeing a few others as potential cuts, like Wurmcoil for Void Winnower. Wurmcoil is just a great way to keep a board post wrath, as well as recover life so we arent such a juicy target.

Removed:
Sadistic Hypnotist
Disciple of Bolas

Added:
Eldritch Evolution
Yisan, the Wanderer Bard

Makes me sad to drop Disciple, but we run so few high power creatures anymore. He doesnt net us enough value anymore to be of any benefit. In most instances, he is a sac outlet to gain 1-2 life and draw 1-2 cards. He is replaced by a similar effect: Evolution allows us to get something we need rather than just a card or two. Next, Hypnotist. His CMC is really what hurts his inclusion. By the time I can cast him and really benefit from him, I should be winning in other ways. He's been a dead card most of the time. while I dont doubt he could return, he is incredibly expensive resource-wise and seems winmore.

Removed:
Wurmcoil Engine

Added:
Llanowar Elves

Hurts me to do, but Wurmcoil, as he is, is solid here. He is, but I played a few games the other day and not hitting my mana dorks until 5-6 cards in with the new mulligan rules really hurts, and prevents us from getting off the ground at all. So as it stands, Wurmcoil isn't as necessary to the gameplan.

Removed:
Tainted Wood

Added:
Twilight Mire

Tainted Wood can occasionally be bad. I'm keeping it as a maybe for now, in case I need more dual lands, and I do, but I also want to be careful of Ruination and Back to Basics

[b]Removed:
[cards]Grave Pact
Dictate of Erebos
Gray Merchant of Asphodel
Kokusho, the Evening Star[/cards]

Added:
[cards]Animate Dead
Void Winnower
Merciless Executioner
Fyndhorn Elves[/cards]
[/b]This wont win me any fans, but since we can handle most boards now, we no longer need Grave Pact and Dictate. Tokens can be dealt with by other means, and if the board is that big, I can find room for a Toxic Deluge. Merciless Executioner comes in to double up with Fleshbag Marauder, as looping them a few times typically deals with the board.

Fyndhorn elves and Void Winnower replace Gary and Kokopuffs. We dont need to focus on these slow wincons anymore. Animate Dead enters to help us loop key creatures more.

Removed:
Void Winnower

Added:
Pattern of Rebirth

I know, I removed it for being too slow and now it's back. But as the deck has evolved, I have fewer high priority targets, a lower curve, and targets like Mindslicer or Necrotic Ooze that demand being put directly into play.

I'm also looking to find a Chord of Calling, Bloom Tender, and Dark Confidant. I also picked up a Worldly Tutor, so I'm looking to make room for those as well.

Removed:
Bitterblossom

Added:
Chord of Calling

Moving away from Grave Pact Meren to combo/Attrition Meren, we dont need faeries anymore. Awakening Zone serves a special purpose of generating mana and experience counters on its own. Chord enters as another way to hit Mindslicer/Necrotic Ooze/Mikaeus, the Unhallowed/ Triskelion

Removed:
Golgari Signet

Added:
Diabolic Intent

I feel our Green mana production and ramp is sufficient to not need a signet, as it dilutes our gameplan (we want mana dorks, not rocks), and reduces our potential tutor count, and especially really excellent and synergistic ones like Diabolic Intent

Removed:
Wood Elves Carrion Feeder

Added:
Magus of the AbyssWorldly Tutor

I'm retesting Magus, and since we have enough fast mana dorks now, I figure I would cut one of the weakest. However, I do like Wood Elves to fetch my [card]Bayou[/card]/[card]Overgrown Tomb[/card], so we shall see. Magus is being retested as a way to control the board since my meta is full of either token swarm decks, which we can handle, or decks that use 0-2 creatures on the board at any given time.

Carrion feeder is better in a build focusing on Meren's reanimation ability. We are winning via combo now, and while gaining experience counters can be useful, it is not ultimately important. Therefore, Feeder gets the cut. Obviously he does over Viscera Seer who can scry for us. Worldly Tutor I've been trying to fit in for weeks now, hoping to give it a shot tomorrow.

Removed:
Oppression

Added:
Priest of Titania

Oppression is winmore with Mindslicer, and otherwise can harm us or just be... useless. Priest is another mana dork since I've seen plenty of hands with the new mulligan rule that dont contain any dorks.

Removed:
Priest of Titania

Added:
Thorn of Amethyst

I've got enough mana dorks, Necroplasm on the watch list. Thorn is here to slow down control and combo decks.

Removed:
Dawntreader Elk
Pattern of Rebirth

Added:
Priest of Titania
Defense of the Heart

Priest is back due to needing better two drops. Farmhand's cost is somewhat prohibitive at times, but Dawntreader Elk is a poor Yisan/Pod target over priest/Fauna Shaman and since it wants to sacrifice itself. I picked up a judge promo Defense, so I had to include it. My meta is more keen on going wide, so having an "I win" one card combo to fetch Mike+Trike seems better than just a poor Mindslicer tutor.

Farmhand is on the watch list, as is Sylvan Scrying and Necroplasm.

Removed:
Necroplasm

Added:
Pattern of Rebirth

Pattern returns! While I dislike how slow it can be (And it's pretty annoying in your opening hand), the ability to just grab whatever I need is obscenely strong. Stronger than another awkward token killer like Necroplasm, which isn't as big of a concern anymore for my meta. What I have found is a lack of an ability to find answers, specialized ones, or my wincons before others win. More tutors are necessary.

Removed:
Forest

Added:
Tainted Wood

Prepping to add Hermit Druid, so we need more non-basics!

Removed:
ForestTainted Wood

Added:
bazaar of Baghdadgaea's cradle

edit: Decided to add more expensive lands as proxies.

Removed:
Viscera Seer

Added:
Hermit Druid

While it pains me to do so, after moving from the midrange shell, Seer only remained as a way to poorly dig while Meren was in play, to gain exp counters, or to save a target from exile removal. It's not a good topdeck anymore, and as a result, I included something else that is always a huge threat and will eat removal like no others - Druid. He also will allow us to dig deep for combo pieces and disruption for Meren to reanimate, I hope.

Removed:
Swamp

Added:
Reanimate

Too often I've needed this spell to save my butt or to combo off, and thus I've added it in. I dont think missing a 33rd land will hurt with 13 mana dorks/mana fetchers, plus sol ring/crypt

Removed:
Awakening Zone

Added:
Tooth and Nail

I've been waiting for this day for months. I finally got a copy, and I can replace this underperforming card. Zone is fine in midrange Meren, but here it's just not a good card. We use Meren as a backup reanimator effect, and not a primary one.

Removed:
Shriekmaw

Added:
Null Rod

Shriekmaw was a tech piece, that's for certain. However, most of the things I'd want to remove are artifact or black creatures, so he's a blank card to me. Too often I dont want to see this guy, and I cant remember any games where I pulled out a win because of it.

To that end, Null Rod enters its place, finally. Picked up a japanese copy too! This should help us slow down other combo and stax decks. While it does turn off some of our rocks and Birthing Pod, it's usually worth it.

I'm looking to cut Yisan and Diligent Farmhand for more mana dorks+Entomb/Dark Confidant.

Including Meren herself: there are 10 Shaman & 8 Humans. There are also a bunch of Elves & Druids (I didn't count all of those). Don't you think Cavern of Souls is worth playing?

Removed:
Attrition
Evolutionary Leap

Added:
Root Maze
Dark Confidant

I'm replacing Leap and Attrition for similar reasons. This decklist isn't a midrange deck, so playing the grindy sacrifice game isn't advancing our gameplan. To stall better, Root Maze. Missing Attrition's ability to remove threats is solid, but if Shriekmaw cant cut it, neither can this imo. Evoltionary Leap was one that hurt to admit that it needed cut since it's so thematic and powerful. However with no control over the creature we get, Confidant will give us those same cards with life instead.

Removed:
Volrath's Stronghold

Added:
Forest

I dont know how many fans I'll win over with this one... but Stronghold hasnt done anything for me since the days I ran this as a midrangey build with Gary and Kokopuffs. It's so slow and a tempo loss since we miss our draw. Biggest thing it can do now is function as a slow Meren replacement in a pinch or abuse Mindslicer. Meh. It's replaced by a Forest. But at least it's foil!

Removed: