Sara, Krallenhorde Nightkeeper

Vigilance, Trample, Haste
Each other Werewolf you control get +1/+1 for
each Human you control and have Haste.
Humans you control get +1/+1 for each Were-
wolf you control and have Vigilance.
Whenever a non-token Human enters the battle-
field under your control, you may transform
target Werewolf.