A 1/4 with ward 1 defends itself well, and just by attacking and conniving, you can boost Raffine and other creatures you control, and fill your graveyard for shenanigans and value
For context, that means each pack in the box goes from $5.49 down to $4.66
As long as neither player is manipulating their library or using their graveyard, using a Millstone does nothing but reveal information until the player being milled runs out of cards, but it took more explanation than you can possibly imagine to make players understand this
Im definitely always in favor of cards that can punish the prevalence of green ramp and this one offers a tangible reward in the form of your own temporary mana acceleration
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This way, you can get around the Activate each exhaust ability only once clause