Not sure if you are still working on this deck but I have found necropotence to be really strong in my lyzolda list. Makes gray merchant hits really strong.
Tap out turn 5 for him, next turn he swings, he either gets vapor snagged, gideon lawkeepered, doom bladed, dispatched, or decimated by a titan on turn 6 because he doesn't have haste.
The fact that he doesn't have haste makes him an average card. He can't do anything on his own except be a one time recurring pest. And either way if you can protect him he requires 4 turns to actually kill. He is at the same power level as bloodgift demon but even he doesn't see competitive play.
The point is that he is good but he doesn't warrant a spot in any competitive 60 card list.
any green competitive deck has to have better Ramp than turn five...
I don't know i mean i can turn three a grave titan or a primeval titan in my standard pod deck he wouldn't be that hard to pull out and if i could then pod him and use a hex parasite i could pull out a titan a turn, i wish it was first strike death touch instead of vigilance trample would fit perfectly with my glissa's in my deck.
any green competitive deck has to have better Ramp than turn five...