Chishiro is reasonably costed as a four-mana 4/4 with some nice rules text
There are also a lot of them with very useful abilities beyond the combat zonesuch as Auriok Salvagers or Captain Sisay
Thats already card advantage, and your commander just stays on the table if your opponents dont have artifact removal, threatening all manor of infinite combos, and sometimes even attacked as a large threat
That part has some specific wording, namely it doesnt say legendary permanents, which means even if you completely whiff on the first part of the card, this could be 6 mana to draw 3+ cards at least once
So we're going to talk about the best that everyone's favorite sea-dwelling tribe has to offer in the Commander format, ranging from artifacts, creatures, and potential Merfolk commanders
These also fizzle any bonus effect on things like Lightning Helix