Yes, spending five treasures is a lot, but Mind Control and similar cards are considered premium removal that usually costs a whole card
The set launched on November 15 alongside Foundations, and here's every single card you'll be able to find in it
It has group hug themes without being a Phelddagrif or Zedruu the Greathearted deck, just something more sinister
Heres a bit of a left field deck suggestion: Nine-Fingers Keene wants to get as many different Gates onto the battlefield as possible, so having an instant to assist in that mission will be a sneaky inclusion
Example: An ability reads, All artifacts are 1/1 artifact creatures. If a permanent is both an artifact and an enchantment, it will become an artifact enchantment creature. Rule 205.1b., for instance, explains that if you animate an artifact using Tezzeret, Agent of Bolass second ability, it will retain all of its prior sypertypes, types and subtypes
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