It is noteworthy that you cannot really consider Fountain as thinning of a deck when looking at land ratios which is a shame
If you want to open the scene card for Tony Stark / The Invincible Iron Man, you'll need a play booster or collector booster from Marvel Super Heroes and hit a less than 1% since it is mythic
You can find these in the latest Scarlet & Violet English sets for example, both in Pokemon, Trainer, and Tool forms
It's a cool ability, which has surely only gotten better over time with all the artifact tokens floating about, but since it's printed on a three mana artifact that does nothing when it hits the board, it's no wonder this card has remained obscure until now
Creatures with impending often have enter and attack triggers, letting you get a bit of value out of it straight away, before having to wait a few turns to swing out and get even more