The Mana Base The decks mana isnt particularly demanding, but as with any 3-color deck, youve got plenty of nonbasic lands in the list to get you rolling without any issue
While this solution doesn't help for sanctioned play, there really isn't any reason to spend nearly $1,000 on a single card to play with your local Commander playgroup
Sycorax Commander and The Master, Gallifrey's End are examples of cards that trigger The Valeyards villainous choice trigger
I feel like even allowing for destruction is a bit generous, but between stripping indestructibility and mass exile, the distinction likely doesn't matter much
People may try to make a combo deck work with Animation Module and Metallic Mimic as well, but overall, I think Srams Expertise may see more play than deserved in this upcoming combo-heavy format
One other subtle strength here is the degree of control you can have over exactly when cards are milled, and how many (assuming you have painlands or other unrestricted self-damage sources)