Many of the millers either have mass appeal (Grisly Spectacle), insufficient support in UB (Doorkeeper), or are just plain bad (Shriekgeist)
This is most effective if youve got some strong enter triggers out on the battlefield, but either way Id save this in your hand until you need it to dodge removal or a board wipe
As a result, there are commanders that dont mention these creature types but that can be effective for a sea creature theme
These changes are going to take yearsdont expect to see them all in the next few months, but you will see things here and there. The next example well see of these experiments is coming in Commander Legends in the form of Keeper of the Accord, which was revealed during todays panel: Keeper of the Accord may not address the card draw portion of strengthening White, but it takes the Land Tax and Knight of the White Orchid form of ramp that already exists in White and scales it up to be even more powerful in multiplayer Commander games
And if you need more, you can pair Silas with nineteen other legendary creatures to do whatever you want to do
Depending on how things shake out in terms of your opening hand, you will have two fantastic characters to choose from in the early turns, including Captain Hook and Mulan (Disguised Soldier)