Jack, Bloodmoon Herald

Sculk, menace, flying
when Jack, Bloodmoon Herald enters the
battlefield it becomes night. As long as Jack,
Bloodmoon Herald is on the battlefield it is night
and cannot become day.
At the end of your turn create X black 1/1 Bird
creature tokens with flying and menace where X
is the number of turns in a row that it's been
night.