mtg card pool Magic The Gathering - Unfinity they may cast a spell from among other cards exiled with Knowledge Pool without paying its mana cost. Spawning Pool MTG - Tenth

Overwhelmed Apprentice is actually quite similar to Merfolk Secretkeeper and Wall of Lost Thoughts, in that it mills a couple of cards while also putting a body on the battlefield to play defense

But this is what I have found works for me

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Wait, was I skipped? You can play into Timesifter by stacking the top of your library with Sensei's Divining Top and other scry effects, or just loading the rest of your deck with high mana value creatures like Scornful Egotist (maybe playing well in the 99 of a Yuriko, the Tiger's Shadow ninja deck)