15 cards where the set is “spg” and the collector number >= 39 and the collector number <= 53

Dismember (Special Guests #41)
Endurance (Special Guests #48)
Endurance (Special Guests #53)
Expressive Iteration (Special Guests #43)
Fury (Special Guests #47)
Fury (Special Guests #52)
Grief (Special Guests #46)
Grief (Special Guests #51)
Persist (Special Guests #42)
Prismatic Ending (Special Guests #40)
Solitude (Special Guests #44)
Solitude (Special Guests #49)
Subtlety (Special Guests #45)
Subtlety (Special Guests #50)
Thought-Knot Seer (Special Guests #39)

It is the moment of discovery, the triumph of the mind, and the end of these results.