Not only is this made tricky by the fact you're looking for Rainbow cards, it's also harder as you need to collect three of them
Another type that is hard to get
These cards will all allow your creatures to tap for mana, netting infinite Squirrels after a few ability activations
She was behind all four of Crown Zeniths blisteringly good gold cards, Fusion Strikes Mew VMAX alt-art, the Mewtwo V-Union four-parter, and most relevantly here, Obsidian Flames Charizard ex
Mirrodin Soul Foundry Living Hive was the first creature to turn each point of combat damage done to a player into a creature token
For anyone whos too overwhelmed by the prospect (or the cost) of buying and collecting actual Pokmon cards and doesnt have time to mess around with the app version for smartphones, its the perfect shot of late 90s trading card nostalgia