Polyxene, the Wicked Shade

Flying
Whenever Polyxene, the Wicked Shade deals combat damage to a player you may pay {2}{b}{b}. If you do, each opponent sacrifices three creatures. If an opponent can't sacrifice any creatures this way, that opponent reveals their hand and discards all noncreature, nonland cards from it.
You heard me, and did not obey. Punishment is essential in your learning.