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This is pretty powerful when you think about it, except for the fact that its limited to once per turn on your end step

Electro, Assaulting Battery is seeing some strong action in Commander at the moment, generating a ton of red mana for you to use straight to the face when it eventually leaves the battlefield

7 Mewtwo & Mew GX: Unified Minds (Secret Rare) $149.59 Double The Mew This dynamic duo will forever be linked from their name to their DNA, as Mew and Mewtwo form an unlikely partnership on this colorful card

Throw in a Bladed Pinions, and we have a massive engine

and in non-Snow versions, we still do

For Standard, I imagine Jeskai Ascendancy could easily be the centerpiece of a token-convoke deck that deploys Ascendancy, makes a bunch of tokens on turn 4 and wins with those and Ascendancy triggers on turn 5