Using a reaction to help pay the cost of another reaction
Ruling issued on November 19th 2024

Situation:
An opponent plays a reaction. I would like to react to it. I have resources in my scrap pile which could help pay for my reaction, but they are not the correct type of resources. However, I do have the card Swap Resources in hand, which allows me to change the type of resources I scrap. Could I pay for my reaction by scrapping cards and using Swap Resources ?

Ruling:
No. When a reaction is played, the game pauses, and you may only react to the last played action or reaction. Scrapping resources to help pay for the cost of a reaction is allowed, but playing Swap Resources would start a parallel chain reaction, which is not allowed.