A creature that’s both a Wolf and a Werewolf gets only +1/+1 from Nightpack Ambusher’s ability.

Because damage remains marked on a creature until it’s removed as the turn ends, nonlethal damage dealt to other Wolves and Werewolves you control may become lethal if Nightpack Ambusher leaves the battlefield during that turn.

Nightpack Ambusher looks at the entire turn to see if you have cast a spell, even if Nightpack Ambusher wasn’t on the battlefield when that spell was cast. Notably, you won’t get a Wolf token during your end step if you cast Nightpack Ambusher during your turn.

If you cast a spell that was countered, Nightpack Ambusher’s last ability doesn’t trigger.