While Mill X cards like Wall of Lost Thoughts will churn through four cards for two mana, which isnt a terrible mana to mill ratio, without top deck knowledge theres no way of knowing what exactly youre putting in your graveyard
KEFKA, COURT MAGE // KEFKA, RULER OF RUIN Speaking of Final Fantasy , have you checked out Kefka yet
Her -1 ability is key to an infinite combo with Oath of Teferi, so Planeswalker tribal decks have a home for her too
This is valuable because you get to see what people paid for your card recently
One of the strongest uses of this is doubling the activation of your fetch lands like Prismatic Vista and Marsh Flats for ramp in Orzhov, but black has long asked its mages to pay like for value
Consequently, enemies are incentivized to use their removal on other creatures you control, which powers Ratadrabik's token ability