Hey, nice start on a budget with upgrading the Wilhelt precon. In the deck editor you can add CMDR tag to Wilhelt text making him the official Commander of your deck.

1x Wilhelt, the Rotcleaver *CMDR*

You currently have 2x Rooftop which can't have in Commander. Some cards here that are in my opinion not worth playing because there's better options on a budget.

• Curse of Unbinding
• Hour of Eternity
• Mind Rot
• Abattoir Ghoul
• Shadow Kin
• Butcher Ghoul
• Stitcher Geralf
• Eternal Skylord
• Havengul Runebinder
• Drown in Dreams
• Ultimate Price
• Cancel

Dreadhorde Invasion and Midnight Reaper are in the Wilhelt precon, consider adding them back in? They're some of the better cards in the precon because of they're repeatable effects especially Invasion with Wilhelt.

If interested I offer more advice. Good luck with your deck.

Hey, you're welcome.

Some advice for the first thing to consider changing is adding a few more lands since 32 is low amount. Try adding two utility lands and 1x more Swamp for 35 lands?

• High Market: sac outlet.
• Tyrite Sanctum: repeatable way to make Wilhelt bigger by putting +1/+1 counter on him. After it's put a counter on Wilhelt it can be saced later to make Wilthelt indestructible.

To add three more lands consider cutting a few of the lesser nonZombie cards such as Mind Rot, Hideous End and Weave Fate?

Some budget Zombie upgrades to consider:

• Undead Augur --> Butcher Ghoul
• Dreadhorde Invasion --> Marsh Hulk
• Death Tyrant --> Unhallowed Phalanx
• Pyre of Heroes --> Highborn Ghoul
• Carrion Feeder --> Grim Guardian
• Headless Rider --> Shadow Kin
• Geralf, Visionary Stitcher --> Two-Headed Zombie
• Nantuko Husk--> Zombie Outlander
• Fleshbag Marauder --> Unbreathing Horde
• Noosegraf Mob --> Stitcher Geralf

Some budget nonZombie upgrades to consider:

• Necromancer's Stockpile --> Moan of the Unhallowed
• Dark Privilege --> Ultimate Price
• Swiftfoot Boots --> Siphon Insight
• Victimize --> Drown in Dreams
• Lazotep Plating --> Rotten Reunion
• Mind Stone --> Mimic

Undead Augur, Dreadhorde Invasion, Fleshbag Marauder are in the precon.

Death Tyrant has a powerful repeatable effect with Wilhelt and decayed. Any creature you control that attacked and dies while in combat you create a 2/2 Zombie. When decayed Zombies attack they're saced at the end of combat step. At the end of combat step decayed Zombies are still attacking therefore with Tyrant when they're saced you create a 2/2 Zombie for each one.

With Wilhelt and a sac outlet such as Carrion Feeder you attack with your Zombies and then sac them in combat to create 2/2 Zombies and decayed 2/2 Zombies from Wilhelt. On your next turn you attack with all the 2/2 Zombies and decayed Zombies and while in combat sac them again to make 2/2 Zombies and decayed 2/2 Zombies. Death Tyrant lets you repeatedly recycle all attacking decayed Zombies into 2/2 Zombies that don't have decayed. This recycling results in a lot of die triggers which Zombies can take real advantage of with many different die effects.

Hope this helps and if you have any questions about these card suggestions, ask here.