While Planetarium does get stronger when you add other Scry and Surveil effects to your deck, because of the artifacts activated ability, you dont even need to build around it for it to pull its weight
The only hurdle to jump is to make sure you have a good balance of humans and non-humans, but as most of Final Fantasy s creatures are humans, that shouldnt be too difficult to accomplish
Ironically, the bonus card with the highest reprint value at the moment is Vivi Ornitier at $34
A seven-cost character with four willpower and eight health who can Shift for five ink, Gramma Tala, Spirit of the Ocean has the ability Do You Know Who You Are
Keyword counters will grant the permanent that keyword even if it's meaningless (such as trample on an enchantment)
You can do some fun stuff with this in Commander, like using Ashnods Altar to pay the equip cost and looping through Mitotic Slime or Wurmcoil Engine tokens until you swarm the board
