Lyra of the Snowfang

(Werefoxes count as Werewolves)

when Lyra or another snow creature enters the battlefield, create a 1/1 white fox snow creature token with daybound

Other Snow creatures you control get +1/+1, then if they are foxes, they gain vigilance

Daybound (If a player casts no spells during their
own turn, it becomes night next turn.)