For maximum impact, run it alongside Umbral Mantle for infinite mana
why choose a historic-matters deck when I can mess around with suspend, paradox, or be a literal villain
And thats not all: remove flying counters from your creatures placed on them by Luminous Broodmoth, slow down the aging of Cumulative upkeep cards, like Mystic Remora (or Blizzard, if you feel like putting flying counters on opponents creatures like a monster), allow Undying creatures to continually un-die the (giant robotic manta in the) skys the limit
In Unstable, some of the 216-ish cards featured different variants that had different art, flavor text, watermarks, or even abilities
On my upkeep, I got back Bird of Paradise and then I cast Spike Feeder
This is something it's since done for other Secret Lair crossovers, like MTG Stranger Things and Street Fighter