1 Japanese Booster Box (PRB-01) is an easy add to your rip list
Since the deck is severely lacking recursion -- Sliver Gravemother is our only source that I don't recommend being reliant on -- I decided to add the two best options for the deck, Patriarch's Bidding and the absolutely busted Eerie Ultimatum
The sorcery Slime Against Humanity, first printed in Murders at Karlov Manor, can make building a slimy, oozing commander deck a breeze
Gruul decks usually rely on red for removal, which means they can struggle to kill large creatures
However, I'm going with Anikthea here because I find her abilities more interesting: she requires more setup as you want not just enchantments in the graveyard to recur but also evasion / blink engines / populate to take advantage of her which is going to lead to consistency issues, but once the deck starts popping off things get wild
[card]Triumph of the Hordes[/card] This card is one of the best win conditions against players gaining a ton of life or sitting behind multiplicative defenses like [card]Gisela, Blade of Goldnight[/card]