I don't really have much experience with Lazav, but I think a neat trick to have on hand would be the capability to turn him into creatures who are very cheap for their size but have drawbacks when they come into play. Myr Superion , Skaab Ruinator , Hunted Horror , Eater of Days and Phyrexian Dreadnought all lose their drawbacks if you stick them in the 'yard and have Lazav turn into one. Likewise, it might also be worthwhile to find room for Buried Alive so you can line up three options for Lazav.

Thanks for you input, ClockworkSwordfish!

Initially playtesting the deck i realized that without the access to the access to useful wheels is rather limited. Therefor i tried to limit the number of creatures i'd feel devastated to hard cast then get into the graveyard later on. So far Maralen of the Mornsong is the only one. And trust me, if i hard cast her, people really shy away to block/attack into her, blow up the board and so on.

Without discard options Phyrexian Dreadnought is the only close to convincing option of your suggested creatures. And that one sits at 20€ right now. Which is way more than i'm willing to pay for a two turn clock. Consuming Aberration , Mortivore , Nighthowler , Wight of Precinct Six and Phage the Untouchable are capable to one shot opponents usually.

Buried Alive has been in the deck for a while, but proven to be risky. Buried Alive plus Ornithopter et al, one of the above finishers and the requirements for said finisher to be lethal, maybe even mana to counter/protect my commander isn't as easy to come by. And that's just considering the best case scenario.

Usually i prefer to bluff a missing piece in my graveyard, just to get it there via Entomb , Cephalid Inkshrouder , Key to the City and the likes when the window of opportunity is there.

I'd like to try Geier Reach Sanitarium as another looting land to see if it fits.

Anyhow, thanks for checking out and analyzing my decklist, i appreciate it!