I use this decklist to test card interactions.
1. Put the cards you want to test into the market
2. Go to the Into Shadow campaign, and skip to the last mission: Azindel
3. Click to skip the dialogue
In that game you start with 50 power and perfect influence, so you can play merchants to get the desired cards out of the market and see how they interact.
(For this example market, Skycrag Adept is not able to get Pin the Jotun from the void)