Possible cards you might want to add: Saw in Half (this is usually better than a flicker, but why not run both?), Thran Dynamo (really strong ramp to get your Commander out or recast him, if you're worried about it getting blown up then perhaps Skyclave Relic), Night's Whisper/Painful Truths (both of these are very low to the ground draw that are easy to cast, they are very able to turn a hand you'd have to mulligan into a strong keep), Burnt Offering (this is probably a stronger effect in here than Dark Ritual
4 Clefairy (Dream League Promo) $356.00 Living A Dream Clefairy combines with Lillie to form perhaps the most iconic duo to come from the Sun & Moon era, and while this Pokemon hails from Kanto, Lillie is a native of Alola
However, any big changes we might see to the Standard format in future sets could make certain cards wax and wane in value
Rare Misprints: Printing errors on specific cards created accidental scarcity no further misprint copies can be made once the error is corrected
Older sets like Chilling Reign, Ultra Prism, and Crown Zenith are home to some highly valuable gold-colored cards