Wars are expensive. I'm sure we can find a solution that is in both of our best interests.

–Ombreggiato Gritti

Loan is a Vespitole card. It allows you to jump ahead in the game by giving you 8 gold that you pay back by paying 2 gold at the beginning of each turn. This can make your gold go negative. Loan is very useful as after you pay it back, it cycles back into your deck allowing you to jump forward without the original cost to buy the card.