Since Adventures adds so many new ideas and mechanics to the game, and since it's still completely new to us, I thought there should be a thread for this. Also, because I wanted to bring this up in the discussion about Caravan Guard but didn't want to make that thread to fan-cardsy.
So here's a couple ideas I was thinking about that use the Caravan Guard reaction mechanic:
Action-Duration-Reaction $3
Trash a card from your hand.
At the start of your next turn, +$2.
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When another player plays an attack card, you may play this from your hand.
The trashing and lack of card draw makes it a good defense against handsize attacks, and the trashing in general makes it a response to cursers in the long run I guess. You also get the money sooner when an attack is played, which is usually good for you. So it feels more like the reactions we're used to, that actually interact with attacks in some way (rather than just triggering when attacks are played). Another version I was thinking of:
Action-Duration-Reaction $3
Trash a card from your hand.
At the start of your next turn, draw until you have six cards in hand.
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When another player plays an attack card, you may play this from your hand.
This probably counters discard attacks too hard though, and I feel like that interaction is being made too explicit, since drawing up to six at the start of your turn usually just means +1 card otherwise (I guess it also makes it not stack).