Finally, she's good at fetching a creature or artifact from your deck onto the battlefield, and with haste
Xolatoyecs main function is untapping any of your cards with counters on at the end of turn, effectively providing most of your merfolk with vigilance and untapping any lands bestowed with Flood Counters, freeing up mana for counterspells and reaction-based play
The face commander, Brimaz, Blight of Oreskos is fantastic, giving you an Incubator token whenever you cast either a Phyrexian or artifact spell
Few other Voltron commanders have this kind of card drawing capability, which makes Sram especially useful in the 99 of other Voltron Commander decks, though he's well-suited as the actual commander, too
Starnheim Unleashed Reminiscent of Entreat the Angels, Starnheim Unleashed makes angels at a worse rate when making multiples, but the worst case mode of making a 4-mana 4/4 flier is still pretty good
Much as the language I have used here is pretty biased, there is no right or wrong