I figured speeding up the life-draining/damaging process would also be helpful if you wanted to run this deck as the archenemy, as therell be more pressure on you to close out the game quickly when it's one-on-three
With Ygra, Eater of All, I got to play Curious Herd to make a 3/3 Beast token for each artifact target opponent has, after using Ygra to make all of their creatures into food artifacts
Theros Beyond Death
A lot of fetch lands require you to pay life in order to use them, and by doing so, you are expediting your low life gameplan Gain 1 Life Life gain decks and life matter cards will greatly benefit from the fetch lands that gain you life when used
Add the Magic The Gathering card zone layout for optimal card placement
Phenax, God of Deception and Glimpse the Unthinkable loosely fit into this theme, enough to at least give us a functional seven card suite