I believe Gravecrawler is better suited in the Diregraf Ghoul slot.

What might be fun is the addition of Empty the Pits and Mesmeric Orb

Altar of Dementia I see in the maybeboard isn't modern legal, however Undercity Informer is

Thanks for the suggestions and the upvote! :D

I agree that Gravecrawler Is much better suited than Diregraf Ghoul, but the Ghoul has a much friendlier price tag than the crawler. Aside from the fact I only have 1 Gravecrawler right now, the price is the reason i haven't used it too much....maybe someday, but not today.

I did not realize Altar of Dementia wasn't modern legal....Undercity Informer is a great card, but I'm really trying to stay tribal with Zombies, so that's not exactly going to work with my other cards. Empty the Pits is something i could definitely see using, same with Mesmeric Orb except for the whopping $10 price tag. lol

Oh sorry mate, missed the budget tag, fair call

Ghoulcaller's Chant is a nice way to get your important zombies back :)

Seems like a solid list, maybe consider Cemetery Reaper as a way to get extra Lords in with a recursion mechanic (though it anti-synergises with Colossus and the Chant I suggested earlier).

Might tinker with my own old undead alchemist idea inspired by your list :)

Sorry for the slow reply. I haven't had time to get on here recently....

Thanks for your suggestions! :D and I'm happy my list could inspire you.

Cemetery Reaper like you said doesn't exactly flow as well I'd want it to, but it is fantastic for the sideboard as something I could replace the colossus with in case I need to.

Ghoulcaller's Chant is fantastic and something I've considered using in the past, but I never really found a spot for it. I shall try to put it somewhere in here...and even if I can't it as well is fantastic for the sideboard and will definitely have a place there.