Several factors influence Fossil card values: card condition (mint cards worth 3-5x more), rarity (holographic and rare cards command higher prices), first edition status, PSA/BGS grading scores, and market demand for specific Pokemon
It's clear that the deck was once about creating token creatures and gaining +1/+1 counters whenever possible, but the longer you look at the list of creature abilities or spell actions, the more muddy this goal becomes
This can happen if you control a permanent, like Vorinclex, Monstrous Raider, that doubles the number of counters a permanent enters with
Over time, demand for these cards has steadily increased, especially among international collectors who value them as a gateway into the roots of the Japanese TCG scene