Ursiag, Protector of Jund

Flying, Menace, Vigilance
This card enters at no cost if Throat of Jund has
5 charge counters on it. Furthermore, Ursiag, Protecter of Jund cannot attack unless Throat of
Jund is cast, can't be Goaded.
{t} Legendary Creatures on the battlefield gain
+3/3 and unblockable until end of turn.