Red-Clad Watcher

When Red-Clad Watcher enters or leaves the battlefield, surveil 1.
{r}, {t}: Create a 2/1 red and green Werewolf
creature token with "Champion a non-Werewolf creature". (When the token enters the battlefield, sacrifice it unless you exile a non-Werewolf creature
you control. When the token leaves the battlefield, that
card returns to the battlefield.)