Its a creature, so its vulnerable to popular removal, and it requires a way to gain haste or time to let summoning sickness wear off
Green-Blue Town Ramp Play Towns to get extra value from your lands
Going for Intuition into Bargain requires nine as opposed to six mana, but it also allows you to use Lions Eye Diamond to cast Bargain (sacrifice the diamond with Intuition on the stack)
Im more fond of this decks alternative commander if Im being honest
10 Elsa, Snow Queen The Queen Herself Elsa is a big member of the Amethyst card family, and her Snow Queen card is a pretty decent one to have for the early game
You can activate Verminister, sacrificing three of them, then hold priority and activate Altar or cast Plumb the Forbidden to get the other two in the graveyard before the ability resolves, thus getting even more from the trigger