Either way, when you tap for one of two colors without a penalty or cost is awesome
Just below it are the likes of RayEels, Darkrai/Lasers, and Garbodor, which will become even better after Plasma Freeze with the release of Float Stone and the onset of Deoxys- EX and the prominence that Lugia EX will gain in the upcoming format
Being able to destroy all creatures on the board for only four mana is still a tremendous bargain, especially considering that all four-mana board wipes these days have a caveat that could serve as a minor downside (an opponent drawing a card or getting a Clue token, for instance)
Snom can be obtained from Genetic Apex: Charizard, Genetic Apex: Pikachu, and Genetic Apex: Mewtwo packs in the Genetic Apex set
I believe all these factors are what is causing it to rise in price recently
Being able to disrupt your opponents hand so badly at anytime by just playing an item is a particularly powerful move one that could feasibly win you the game just by your opponent failing to draw their way out of it
