Skip any step and you risk a shaky deck
Kuzco - Selfish Emperor is another good Shimmering Skies option with this ability, but Hide Away's cheap cost makes it easier to deploy
So, if I regenerate [c]Isao, Enlightened Bushi[/c], while it has a +1/+1 counter on it, that counter remains
Once you can't, you lose everything you gained
Let's give it a shot: Izzet Phoenix Test | Modern | Jim Davis Creatures (8) 4 Arclight Phoenix 4 Thing in the Ice Instants (20) 1 Magmatic Sinkhole 2 Izzet Charm 2 Lightning Axe 3 Opt 4 Lightning Bolt 4 Manamorphose 4 Thought Scour Sorceries (11) 2 Finale of Promise 2 Sleight of Hand 3 Chart a Course 4 Serum Visions Enchantments (3) 3 Aria of Flame It's hard to feel out exactly how many Chart a Course/Izzet Charm you want, especially with Lightning Axe also helping out to get Arclight Phoenix into the graveyard for value, but there's still some serious things happening here that need to be respected
As we know from past Universes Beyond Secret Lairs, there will likely be a ton of demand for these cards