Josu Vess is fine value as a 4/5 with menace, but really blows up if you can hit its kicker cost
The namesake Flicker was the first card to exile and immediately return the target
It draws cards at a rate that Rowan, Scion of War is happy with, and you can pay a lot of life when you have the mana to untap it
In the case of Avatar, the 15 most expensive cards would cost an eye-watering $4,230 to purchase, and that's just one copy each and without considering the most expensive card of the bunch, which goes for a staggering $5,300 on its own
The activation was added to similarly imply that she was using speed to help others move quicker
Vile Rebirth is a great sideboard card for a problem that does not exist