Tsskriks, Witch of Saltmarsh

When Tsskriks, Witch of Saltmarsh enters the battlefield, create a number of 1/1 black Spirit creature tokens equal to the number of Swamps
you control.
Whenever another nontoken creature enters the battlefield under your control, put a number of
+1/+1 counters on Tsskriks, Witch of Saltmarsh
equal to the number of Forests you control.