At least its a planeswalker that draws you a card each turn
If Boros Strike-Captain leaves the battlefield, the effect allowing you to play the exiled card if you attacked with three or more creatures continues to apply, even during later turns, as long as you attack with three or more creatures during those later turns
Sen Triplets Historically one of the most salt-provoking theft commanders in the format, Sen Triplets can be slow in the current Commander landscape, but it does plenty of work if you can keep it around
Honorable Mention: Lukka, Bound to Ruin - Beastly Oathbreaker Looking for a card to really leverage cards such as Cryptic Gateway right out of the, well, gate
Despite its thematic name, waterbending feels like the sets only true bottom-up mechanic prioritizing gameplay over top-down, flavor-first considerations