Still on the Fairly Simple end of the spectrum, but Doctor Doom, King of Latveria, the Grixis commander who leads the Doom Prevails precon , has quite a few things going for it
This can also be a great build for creatures with evasion like skulk or flying since your creatures come back with toxic 1
Besides this one obvious flaw, the filter options are lacking in comparison to PTCGOs deck builder, and I find it confusing how it lists all prints of a specific card as one, making it harder to select the one you want
We saw this with Strixhaven , where collector booster boxes had an expected value of $650 just before the set was released but is currently just over $300, slightly more than the cost of a box
Urabrask's Forge, Lagomos, Hand of Hatred, and Rite of the Raging Storm are all great for this and will help you to draw through your deck with Shadow on the battlefield