In Commander, Inventive Iteration / Living Breakthrough acts like a hard to interact with planeswalker, at least at more casual tables
For the former, you can use Coastal Piracy to have tokens available for defence after each unblocked attack, any card drawn can be combined with Mystic Redaction, Sphinxs Tutelage or Psychic Corrosion, the Mystical Tutor and Solve the Equation help us find the right cards for any strategy, for example Time Warp, Pyromancers Goggles or Swarm Intelligence (matching the Commander)
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(2019-07-12) You both draw and discard while Bag of Holding's second ability is resolving
What Are the Most Expensive Green Mythics
Showcase Treasures Extended art and foils feel premium