Quote from Tom the Scud
3 - Carrion Feeder/Safehold Elite/Ivy Lane Denizen
Project X is a deck that uses this combo; basically, Ivy Lane Denizen makes persist creatures immortal - when the creature comes back from the graveyard, you put a +1/+1 counter on it, which wipes out the -1/-1 counter, which means it's ready to persist again. The linked deck uses 4 Carrion Feeder and 3 Bloodflow Connoisseur to take advantage of this by easily growing to 20/20 or bigger and threatening to swing in for lethal. The deck can deal with chump blockers by using Elvish Herder to give the big guy trample.
The glue that holds the deck together is Wirewood Herald, which can search for Denizen, Elite, Herder, or other tech like Essence Warden, Scattershot Archer, or Nameless Inversion.
Project X pairs the combo win with an aggro package of 4 Putrid Leech and 3 Nest Invader and throws in 4 Bequeathal, which is basically a green Thoughtcast in this deck. The theory is that the deck can put on early pressure and force the opponent to deal with the aggro threats instead of holding removal for combo pieces. This seems like a pretty promising approach; another possibility for the combo is to run a more controlling/reactive Tortured Existence build and flip into aggro mode once the combo is assembled.
Strengths: lots of synergy. Most of the cards are good to reasonable on their own.
Weakness: removal on denizen is hard to recover from if opponent can stabilize versus the early aggro. Attackers can be chump blocked unless a fourth combo piece comes out.
Quote from KoolMaqeThere is a section for post rotation under new card discussion in standard.
That in mind, I think you should add
Chromatic lantern (the charms are very specific on cost)
Quote from KoolMaqeAlso, can I add this variant to my primer? Will full credit to you ofc.
Quote from agent56kAfter a quick look at your possible inclusions, it seems as though you are really trying to force the artifact deck. Cards like the artifact lands are dangerous to use, and even outright useless unless you get one of the Tezzerets.
It also looks like you're trying to add to much mana fixing. I don't think you need to have the vivid lands. The three primary land cycles and one more of another, maybe a mixture of man lands and bouncelands for your fourth cycle.