You can cast a creature card that has been targeted by Havengul Lich from the graveyard, but unless it has flash, you can only do so if it's your main phase, the stack is empty, and you have priority
The drawback here is of course your opponent's have access to more mana as you do - Just make sure you can fill your hands and drop spells quicker
In case you didn't know, amassing Orcs is backwards compatible with cards from WAR that amass Zombie tokens, like Gleaming OverseerGleaming Overseer and Lazotep ChancellorLazotep Chancellor
Outside of the sets Commander deck, the Eldrazi are still on fine form in Modern Horizons 3, with Ulamog, the Defiler chief among them
Murders at Karlov Manor [Detective-Themed Expansion] Murders at Karlov Manor is a suspenseful expansion set released in early 2024
The other included Commander is Mr