In Magic: The Gathering's widely popular Commander format, your choice of commander has a major impact on deck construction, as your commander's colors directly dictate what colors can be included in your deck
You either get treasure or you peel off a clutch spell
It should also be able to give the player advantage of some sort, incentivizing its inclusion in the deck
Each deck will have everything you need to play, including a choice of two different legendary creatures to act as your Commander
Equip Artifact - Equipment Recursion (CTRL to add secondary) Sorcery Geth's Summons Return up to one target creature card from your graveyard to the battlefield
I think the obvious synergy lines here are Dictate of Erebos and Grave Pact, and if you already lean in on these cards, Im sure you wouldnt mind getting twice the amount of triggers there