We can respond to the Dual nature triggers and give the legend to them and then resolve the DN token
Edit: also if we are trying to use Engineered explosives, we need to be careful about the sunburst/march of the machines interaction.
Also I'm not sure how those layers work at the end? Magda, Brazen outlaw doesn't seem to do anything as we can't tap our creatures without haste, and how is Hellion Crucible getting untapped to even make hellions?
Oh yeah... So we get a lot of main phases and combat phases; each combat phase we untap all our creatures many times, including our animated Manascape Refractors; tapping a Manascape Refractor twice allows us to put a bunch of pressure counters on it, then sacrifice it to create a bunch of Hellion creation triggers; each creation trigger creates many Hellion creature tokens; We can put copies of Utopia Vow on our Hellion creature tokens, then tap them, each one triggering Magda, Brazen Outlaw many times; each trigger creates a bunch of Treasure tokens; we can sacrifice 5 Treasure tokens to shuffle our library, triggering many copies of Widespread Panic; and then it's the usual from there.
Not sure how to fix the haste problem though. as the hellions can just attack and trigger a computation where we have flash.
I can't see how to force a fog variant in the setup, as we can still get started without even casting the only one that does anything powerful: Blessed respite,
Maybe some shenanigans with Glacial Chasm?
Forcing us to cast a falter effect could also make attacking safe, but I don't see a way to do that. (though actual falter doesn't work due to Drake familiar flying, Bedlam would though if we could force us to have it.)