Shigana, God of the Stars

Eminence—If Shigana is in the command zone
or on the battlefield whenever you cast an Instant
or Sorcery spell create a 0/0 blue Starfolk
creature token with Flying and Indestructible.
Flying, Indestructible.
Shigana enters the battlefield with X +1/+1
counters on it where X is equal to the number of Starfolk you control. If X is 10 or more, Starfolk
you control get +3/+3.