This is a budget Orzhov tokens deck.

Creatures

Corpse Knight: Only costs two mana and drains the opponent for each creature entering the battlefield. Does well with Afterlife tokens.

Cruel Celebrant: Has a drain ability like Corpse Knight, but on a death trigger. Works well with Teysa and Afterlife.

Knight of the Last Breath: A big boy with a big Afterlife effect.

Ministrant of Obligation: Has good synergy with Teysa to flood the battlefield with tokens.

Orzhov Enforcer: Cheap, has deathtouch, and has Afterlife.

Sephara, Sky's Blade: A good target for Blood For Bones. Serra's Guardian: Another good target like the above.

Teysa Karlov: She is queen!

Spells

Bankrupt in Blood: Yeah, it costs two creatures, but three card draw is nothing to sneeze at.

Blood for Bones: Great for resurrecting creatures to the field and into your hand.

Costly Plunder: Like Bankrupt in Blood, but less costly.

Fall of the Thran: Do you know what's real upsetting? Losing all of your mana. But, you won't have to worry if you have a flood of flying creatures.

Kaya's Wrath: I love it.

Rite of Belzenlok: More tokens and a big demon to feed!

Artifacts

Bolas's Citadel: I mean, this isn't really needed, but I like big, dumb effects like this. You can replace this with whatever you want.

Glass of the Guildpact: Watch your spirits quickly grow into fearsome fliers!