Whenever you cast a noncreature spell, Thancred Waters gains indestructible until end of turn
I think Jewel Thief could have a home in an aggressive leaning build, but it really struggles in one like this that goes long and it is just way too low impact late
It could be as low as 13 percent, but all things considered, over the long-haul, 15 percent seems about right
That means your opponent has to spend two spells if they want to do something, one removal spell to blow up the Barricade and then whatever their intended spell is
Finally, Chapter III transforms Fable into Reflection of Kiki-Jiki, a 2/2 Creature that can create a temporary copy of another Nonlegendary Creature you control for just one mana
You can be much more sinister though, combining Flying Men variants with extra turn spells to hoard all the extra draws for yourself