We have some hitters in Herald of Hoofbeats and Corpse Knight if you work in a combo, but I think Arkomas Will would make a fine addition to the deck
Almost certainly the most expensive card on our list of Mono-White Commanders in real world terms, Elesh Norn, Mother of Machines is incredibly powerful in games of Commander
The real question, however, is whether Counterspell is good enough to move into the maindeck of stuff like Rigel Espiritus Merfolk deck
having an enchantment diversifies your card types, which is relevant for delirium, and being a permanent matters for cards like Muldrotha, the Gravetide and Sun Titan
This just makes it so your opponent can never play the game at full power
These upgrades are meant to help you cast more Auras, reuse important enchantments, and punish opponents for being forced into combat