Werewolf Heiromancer

Werewolves you control get +1/+0 for each Vampire you control. They also get lifelink if you control at least 3 Vampires.
Vampires you control get +1/+0 for each Werewolf you control. They also get +3/+3 if it's night and you control at least 3 Werewolves.
When Werewolf Heiromancer enters the battlefield, if you control at least 2 Vampires and at least 2 Werewolves, it becomes night.