Getting to buff your board with +1/+1 counters is always good, and considering this has no ceiling, its pretty fairly costed at four mana
After that, we absolutely want mana smoothing cards
This card with Strange Cave and Holon Fossil makes some very serious rapid fluidity in a fossil deck
Hes likely kicking himself still, given in the same year someone bought a poorer quality PSA 7 version for $900,000, which at the time made it the most expensive Pokmon card sale ever, before Logan Paul got one later that year
Dark-bordered cards (many Trainer and Energy cards, plus Secret Rares with black borders) show whitening more prominently
Only a few of these rare cards were ever made, presumably only fewer than 10, with just two known copies printed with the English card back