mtg copy spell cards Doublecast - Core Set 2019 Rules Text: Copy, that, spell,

The biggest issue is giving your opponents creatures to sacrifice if they are playing an aristocrat deck, but other than that, this Scarecrow helps speedup the game by giving flying attackers to everyone

Shes a great example of how you can sometimes find these TAUC loops in unexpected places: if I use her trigger to create an elemental token, Kapsho Kitefins or Court Street Denizen will immediately tap down another opposing creature, which can make another elemental the fun never ends

This is the deck I built last week

Its also not likely for anyone other than a dedicated token deck to have creatures left after this resolves