Locked in Combat: Basic Action Card
Target a character die from each player's Field Zone and set them aside until end of turn (then return them to play at their previous level).
When they return to the Field Zone, deal each 2 damage.
Suppose I don't have any characters in my field, but my opponent does. Can I use Locked in Combat to remove one of their characters from the Field even though I'm not able to target one of my own?