It makes sense that these cards then are the most valuable in the set, combined with a unique border and foil design that compliments the card art
My approach to choosing tools for mono-color decks is to accept the limitations of the color, commander, and themes Ive committed to
In those cases, the entire drop might have art that looks like a fantasy shonen or magical girl show
You can back up the ward trigger with a few counterspells, and the fun thing is, you can wait for your opponent to pay the ward cost and then toss out a counterspell or two to keep Miirym safe
However, it is worth remembering that the vampire tribe was already very well consolidated before this recent incursion
But you still need the raw card to be worth enough to absorb the fee