Picture this. I'm 6-2 in my first Powered Cube draft playing Jeskai Control/Tempo. One win away from a coveted trophy. Turn one: land, Mana Crypt, Pentad Prism. Turn two I could either Expressive Iteration with the Pentad mana, or Cathar Commando their Mox which would put me into a good position with a Balance in hand. BUT WAIT. Pentad Prism has no counters on it. Did I use it already? I couldn't have. There's nothing in my graveyard or exile zone. They had literally nothing on the board. I check 17Lands log. Never came in with counters. Must be a bug.