Stack them so it puts all the permanents into play first to get their ETB triggers, and then exiles them again, to produce more tokens and set you up to do it again the next turn
The problem there is, there are very few cheap creatures that do this, and the most prominent of them is Marauding RaptorMarauding Raptor, which
If things get rough, dont worry, there are some of Aeriths healing spells in there as well.
TheChirurgeon: It also teaches you triple, which is one of the most busted spells in all of Final Fantasy, letting you triple cast a spell for only one cost
If your untap step is somehow skipped as your next turn begins, your phased-out permanents won't phase in until the next untap step you actually have, but you'll no longer have protection from everything and your life total can change again
The hardest part about pulling one is deciding whether you keep it for your Commander Deck