Blink

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
I, III — Choose target creature. Its owner shuffles it into their library, then investigates. (They create a Clue token.)
II, IV — Create a 2/2 black Alien Angel artifact creature token with first strike, vigilance, and «Whenever an opponent casts a creature spell, this permanent isn’t a creature until end of turn.»

Card Details:
Set: Doctor Who
Collector Number: 116
Artist: Colin Boyer