I think there might be a thread about this already... but I had a dream last night that I was playing with a new card that had just been released...
[Don't remember the name]
$4 Action
During your cleanup phase this turn, draw an extra card.
So yeah... it's a really terrible Caravan. Instead of +1 card +1 action, you get the extra card in hand during your opponents' turns. A benefit if you have reaction cards in your deck, or against Mountebank or Young Witch, because you're more likely to have the defense card in hand when they play an attack. But a major draw-back if they have any hand-size reduction attacks.
Also, it should be a Duration, because even though it doesn't affect your next turn, it affects the cleanup phase, after it would have otherwise been discarded, basically just like Outpost.