This not only doubles her damage for whatever poor soul you decide gets to die via commander damage, but also doubles the amount of Monks you get to put down, all of which have prowess as well
A handful of others are displayed in the image above if you spot any of these, sleeve them and keep them in good condition
(Due to placing thine testicles upon said table it is not uncommon to get the shit targeted out of you, but that's why we run various forms of protection, and interaction) If you have extra mana per chance you can tutor as many of the 5 color Slivers as you can, ideally playing The First Sliver FIRST for free of of Morophon, the Boundless, then you get to cascade into as many Slivers as fate will allow, once Morophon, the Boundless and Sliver Overlord are on the field, if you have a mana Sliver ( Gemhide Sliver, Manaweft Sliver, or Cryptolith Rite ) and a haste Sliver ( Cloudshredder Sliver or Heart Sliver ) you can do this much more efficiently, typically outright winning the game
Itll never double tokens like Treasures or Clues, but these cards have proven popular and expensive in the past, and Id be shocked if this one didnt follow suit