mtg whenever you exile a card Flamekin Herald [Commander Legends] Zevlor, Elturel Exile | Commander

Ixhel, Scion of Atraxa Ixhel, Scion of Atraxa isnt only a reliable way to give players poison counters, it also has a very powerful ability once those counters start to stack up on your opponents

Orazca Puzzle-Door and Hermitic Nautilus are a couple of examples of new blue cards from The Lost Caverns of Ixalan that you can use to craft with two other nonland permanents with activated abilities for the card to transform into Locus of Enlightenment

Sound the victory fanfare

I think Sliver Queen is overall the strongest commander for this restriction, and I did brew a deck around her, but ultimately for Commander Clash I wanted to go with something even more iconic so I went with Vaevictis Asmadi