Board Game Arena

My opponent just took a Minotaur. I rolled 4 VP x3, and am about to lose 12 VP. I have a Cerberus token. If I use it now, will I double my losses, e.g. lose 24 VP, or lose 12 VP and gain 12 VP for a net of 0 VP? Actually, I have 2 Cerberus tokens. If I used them both, would I end up -36 VP or +12 VP...