A big issue I see is that you ' re running quite a large number of infinite combos . The issue I see with this is that you ' re running TOO many . I see a lot of cards that are only useful inside their combo IE , sanguine blood . Meaning you ' ll often have scenarios with multiple useless cards in hand and no way to access their other combo pieces . In addition , you seem to be missing what many consider to be the best Golgari Graveyard combo necrotic ooze . Nooze combo consists of phyrexian devourer , , and Nooze itself . It involves getting the former 2 into the graveyard while the latter is in play , allowing you to exile your entire library to deal upwards of 150 damage divided as you choose . It ' s nice for several reasons . First , it ' s extremely easy to assemble via multiple means . survival of the fittest , buried alive , and fauna shaman can all to do it singlehandedly . Buried Alive simply requires that you have some sort of recursion effect , such as Meren herself . Second , Nooze combo ties into multiple other combos . mikaeus , the unhallowed combos with Triskelion , and jarad , golgari lich lord combos with Devourer , allowing you to run 3 powerful combos with just 5 card slots . Another issue , and this is a common one , is that the mana curve seems a bit high . Ideally you want your deck to be as low to the ground as possible . This leads to more plays in the early game , more mana open for instant speed shenanigans , and a generally faster deck . Some cards I would immediately cut Both 6 drops , every 5 drop except Sidisi and possibly Hypnotist and Living Death , every 4 drop except Birthing Pod , Jarad , and possibly Smothering Abomination . Any reason you ' re not running nykthos , shrine to nyx ? Meren is quite permanentheavy , not to mention somewhat grindy when she doesn ' t combo off turn 24 . Nykthos frequently nets positive value by turn 4 , and fuels critical plays like shaman of forgotten ways or tooth and nail in the late game . If you want more ideas , feel free to check out my short Meren primer deckslemonmerenpie .