Three Headed Monkey
The text has you take an action card from an opponent, then given them one of yours.
What if you don't have any action cards left? Can you still take from your opponent?
It seems like if you don't have any left, you end up just giving them back the one you took.
So you start with no action cards, then take a card from an opponent. So now you have one action card in your hand and the advantage card asks you to hand one action card back to other player, so you have to give them the one you just took.