The commander, Inspirit, Flagship Vessel, uses counters to power up from a useless hull to a powerful 5/5 flier that makes the rest of your artifacts hexproof and indestructible
Murkfiend Liege is the best for Commander, seeing as the untap ability is king in that format, but nothing stops you from playing, say, Glen Elendra Liege in a UB fairies deck
Creatures (25) 2 Dauntless Bodyguard 3 Emmara, Soul of the Accord 1 Boros Challenger 2 Trostani Discordant 1 Tajic, Legion's Edge 4 Pelt Collector 4 Gruul Spellbreaker 4 Zhur-Taa Goblin 4 Hero of Precinct One Lands (22) Spells (13) Naya Aggro is easy
(10/2/2025) "Waterbend [cost]" means "Pay [cost]
I have had this suspicion backed up for me from a source that wishes to remain undisclosed, so it isnt just idle conjecture on my part
All of the cards from the Duel Decks are reprints (a couple did get exclusive alternate art) but their unique set symbols should get you where you need to go