I don't know if it is strong deck (at now I'm 5W/2L, too few matches to judge) but this deck is very funny:
Use the graveyard as a bankroll; fill it with Necromancer's Assistant or Mind Rot (if needed), then choose to:
a) destroy opponent's creature with Dead Reckoning, if is possibile choosing a creature from your graveyard that fits the mana curve in the next turn, so you can play it immediately
b) gain life with Rotfeaster Naggot, exiling one of your biggest creature (or one of the opponent, if needed/convenient)
c) cast a free expensive creature like Skeletal Wurm or Griselbrand in turn 6 thanks to Rescue from the Underworld, if possibile coupled with a creature with ETB effect (like Phyrexian ranger Or Lilian's Specter
Therefore, I put many creatures with ETB effect, so in case a) or c), we can trigger this effect again. IN this mode, Shadowborn demon can make 5 damage with Dead Reckoning, then gone to the top of the library to destroy an other target in the next round.
Mind Rot and the ETB effect of Liliana's Specter allows a bit of control, retarding the opponent until the concretization of case a) or b) or c).
Maybe there are a lot of creatures better than Blister Beetle (in my fist build there were Skeleton due to the synergies with Death Baron), but its -1/-1 ETB effect is great against a lot of creatues (the omnipresent Visionary Elvish, the dangerous Chasm Skulker, Wandering Wolf, Triton Storeshalker, Satyr Hoplite, Rockslide Elemental, 2-headed cerberus and so on).
Skeletal Wurm is not a great card, but is useful for its toughness with Rotfeaster Maggot, for its power with Dead Reckoning, its synergy with Dead baron and its useful Regenerate.
Graveborn Muse is very important, to minimize the annoyance produced by Dead Reckoning that -unfortunately- fix your next draw, so obtain 1 or 2 cards more can be vital, especially if the player is waiting for a land.
A nice combo possibile from turn 6: mind rot on myself to put 2 cards in graveyard (big creatures), than Dead Reckoning on one of this big creatures discarded to destroy a big opponent creature, then draw again the creature discarded in the next turn (if the creature discarded is a Shadowborn Demon is very funny, I've killed baneslayer Angel two times in this mode and I enjoed it because I hate baneslayer Angel and -theorically- it is immune against Demon but not against Dead Reckoning).
As usual, any comment is welcome.
EDIT: after a terrible session, now I'm 8/6, something goes wrong, I have to adjust a little the deck