It wasnt quite as popular, due to the fact that the same card appeared in the set as an actual Enchanted, and it was only played in niche Amethyst/Emerald decks - and only one or two copies at that
You need minimum four swamps in play before this starts netting mana, but the mana advantage gets better and better with every land you play
(If the first attack Knocks Out your opponents Active Pokmon, you may attack again after your opponent chooses a new Active Pokmon)
Inkshield goes a step further, heading off a potential killing blow from an opponent and likely unleashing a devastating torrent of tokens from your token doubler effects
Though 'never say never' certainly applies, the chances of it happening any time soon are slim
Ive tried to sneak a few copies of Mutavault into most of my decks recently, but it can be difficult in aggressive or midrange strategies that need multiple colors of mana and are reliant on actually playing spells on-curve