(Some abilities can also target unexerted cards.) But not using them has less of a direct benefit - you dont need to defend your life points, as in MTG or Yu-Gi-Oh!, so leaving cards upright is typically only worthwhile if theyre likely to be challenged by your opponent and you need them for a future turn
A free counterspell that protects your Commander is almost always the optimal pick for a Commander deck as long as your wallet can take it
Below is the list of every planeswalker we know has lost their spark: Aminatou Basri Ket Calix Daretti Huatli Kiora Koth of the Hammer Liliana Vess Mu Yanling Narset Niko Ariss Nissa Revane Ob Nixilis Rowan Kenrith Saheeli Rai Samut Sarkhan Vol Teferi Akosa Tyvar Kell Vraska The Wanderer Will Kenrith If you're interested in diving deep into specific categories of 'walker, we also have guides to the best white planeswalker cards, the best red planeswalkers, the best green planeswalkers, and the best planeswalker commanders.
This decision should be made by our lands, not by our spells
Honorable Mentions The Odyssey Eggs The original Odyssey Eggs dont fit my description of giving you a card back, although they fit colorless mana into specific colored mana like the signets
Since cards with 4 power for 3 mana are about as rare as "Dark Knight Equipment", it is difficult to stop with cards of the same caliber
