If both players have a Cerebro: Cybernetic Intelligence active, can one KO the other?
Place Cerebro on an X-Men die's card. It remains there until you or a card effect removes it (it is still in the field). When you field a die from that card, knock out one opposing die.
Since Cerebro's card text refers to an opposing die, rather than a character, could one player's active Cerebro target the other players active Cerebro die?