There are two recently printed common two cost sorceries in this genre that exile two for the next turn for cheap enough to play they are pretty pricey too (Wrenn's Resolve is sold out here and as high as 2 bucks on other sides, Reckless Impulse is also sold out here and tends to be closer to 2.50 on other sites) The only cheap is the uncommon from a limited Commander only set, Inspired Tinkering, also sold out but a cheaper 30 cents on other sites
It's nasty good at the kitchen table
Instead of relying on attacking the opponents Leader and taking their Life cards until we win the game, Blue Nami wants to mill herself, drawing and trashing cards from the deck until you hit 0 cards
[5] Monarch is commonly banned in Commander playgroups and at kitchen table games just because its considered too powerful
Although each Core provides only 1 mana and 1 threshold element, they have a staying power that allows them to accumulate more mana over time
Again, TCGPlayer does not have an average market price currently, but shows the card listed with a price of $800