Rest assured, theyre not gone
If anything, its a surprise that All Will Be One isnt worth more than $8.06 right now
It landed during the short lived e-Reader era, so the cards carry those dot codes along the edge, and it handed collectors a genuine run of firsts, like the debut of an EX Rayquaza, the first Dragonite to appear in the EX Series, and the first Charizard Nintendo ever produced after taking the license from Wizards of the Coast (WotC)
Below is a matrix of outcomes in each scenario: A player's decision in this situation is likely affected by multiple other factors, including the other cards in play, their hand, their deck, and creature abilities
Comparably narrow to Nissa's Pilgrimage but not as powerful or playable
Its an uncommon, so its less likely to show up in Collector Boosters (roughly every 41.5 CBs) and its immediately being tried in just about every deck that ran Faithless Looting