Gilsteil, Rage Harbinger

When Gilsteil enters the battlefield, you may transform another target werewolf.
Werewolves you control have "2{r}{g}: transform
this creature."
When Gilsteil attacks add {r}{g} to your mana pool
at the beginning of your next main phase.
At the beginning of each upkeep, if no spells
were cast last turn, transform Gilsteil.