The Command Zone deckbuilding template (episode 658) provides the baseline numbers
The surface should be soft so as not to scratch the backs of cards, clean to avoid contamination, and flat to facilitate handling
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This Jace isn't even close to top-tier anymore, but it's still talked about as though it's an unbeatable planeswalker
You do need to target the Blood Moon on the stack, though, as even if you control a Dryad of the Ilysian Grove, which effect ends up mattering is based on timestamps
With both permanents on the field, you can activate the LED, adding 3 blue to your mana pool, then escape it from your graveyard by exiling three cards