Banshee of the Dread Choir is a uncommon Creature — Spirit card from Legendary Cube Prize Pack (PZ1), collector number 39.
Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.) Whenever this creature deals combat damage to a player, that player discards a card.