It is powerful and threatens to close the game out in more than one way without any compromise on effectiveness in either role
That may influence which commander you choose and the strategy you choose for your deck
Mechanically, Special Energy adds flexibility but comes with deck-building restrictions
I grade these cards on their utility and efficiency
Chase iconic cards like Tarmogoyf, Dark Confidant, Vendilion Clique, Kiki-Jiki, Mirror Breaker, and Cryptic Command to craft unbe
Ultimately, this is a placeholder solution so that more time can be spent on fingerprinting and identifying headless browsers (EG: via how they do font rendering) so that the challenge proof of work page doesn't need to be presented to users that are much more likely to be legitimate