While it can exile itself to gain you some life and scry 2, this ability works no matter how Senu ended up in exile, which is what makes it so interesting
It shows up as a cost you pay in various circumstances
Theres not that many ways to generate tokens with prowess, but there ARE mechanics like Heroic or Jeskai Ascendancy which can simulate your team all having prowess very easily and keep that all-important efficiency high
Today we have the first batch of previews of spoiler season for the Final Fantasy set, our missing mechanics, cards for all 16 games including some legends from most of them, and more
A Sultai value commander like Glarb, Calamity's Augur is probably a good shout
As it stands, that means this optimized version of the deck is indeed still better suited for Bracket 4, with Game Changers like Deflecting Swat ready to shore up the defenses