Check out all the Commander Masters precon upgrades here: Sliver Swarm is a five-color deck that is all about Slivers, a creature type where each member brings a unique buff to all your Slivers, from granting them all flying with Galerider Sliver to drawing cards with Synapse Sliver
Plaguecrafter and Braids, Arisen Nightmare force your opponents to sacrifice permanents, which means making more Cyberman creatures if youre making them sacrifice creatures
If youre in a pod where one of your opponents runs an enchantment matters deck with many curse spells, then Witchbane Orb could be a good addition for the protection and removal you need since it can slot into any colored deck
Vial Smasher the Fierce inflicts so much free damage that you might not even need to get into combat to close out a game
Ustaw limity wpat, stawek i czasu gry
Especially the Redrock Sentinel I expect to simply be a very good 3-drop in a lot of the decks of this format