The samurai creature type, unsurprisingly, received a lot of support from Kamigawa: Neon Dynasty
For the most part these can be pretty pricey (especially for cards like Mox Amber), but nows a good a time as any to grab blueprint versions if thats your jam
First of all, because it forces you to have four creatures in your graveyard to start the juices flowing, it can be answered by graveyard removal or just by someone who bounces, tucks, or exiles your creatures
As long as the exiled card is a creature card, Duplicant has that card's power, toughness, and creature types
The first to enter this list is Glarb, Calamity's Augur, a three-mana potential commander who can trade favorable in combat and also Surveil two cards deep to play either lands or spells that cost four or greater from the top of your library
Hakbal is the best Merfolk commander, but in my opinion, he's not the commander that represents them best