Your goal in Three Souls: Rivals is it to be the Last-One-Standing! To do that you will have to defeat your rivals before they defeat you. To make your fight easier, or to make sure others have a hard time to get to you, you get to choose from 5 randomly drawn Resistance Cards. You choose 3 out of those 5 cards that will represent your personal resistances and abillities against attacks., but be careful not to loose them!
You will loose resistances througout the game by having one or more rows on your soulboard defeated!
To stay in game longer you are hoping to find Artifact- or Support Cards, that might help you prevent some damage or heal your battle scars before it's too late.
It is important for you to not only go against the biggest, baddest, rival on the table, but also to make sure your best, most valuble resistances or abilities stay alive long enough that you can utilize them to the fullest of extend.
Are you behind and lost your first resistence before everyone else? Well that might make you change your strategies from trying to beat down your rivals to temporarily forge an alliance with a couple of them. But be careful, when you do, don't trust them too much. After all, only one may survive!