As for your background, its common to pair Gale with Scion of Halaster to stock the graveyard, but I could see a burn-centric brew leveraging Dragon Cultist to great effect
Chaos Warp Chaos Warps original claim to fame came in the early years of EDH, back when the only way to permanently remove a commander was tucking it into a library
Its absolutely devastating against a non-basic heavy mana base, and Mark Rosewater has gone on record to say that this hits mythic-rares too [link to Maro quote]
The single-target trigger works with mutate, meaning you get double mutates
was one of the four precons released as a part of Magic's Universes Beyond crossover with the Fallout franchise
Cards like Eerie Interlude and Lae'zel's Acrobatics also allow you to target all your scarecrows, which will give you a lot of chances to remove permanents