Hi, I had a question about this spell.
I think I never successfully cast it on someone due to the small chance to win the trade so I would like to know how the attack/save works for this spell.

Is it a confrontation between me and my target ? (we throw dices together with our ability modifiers and the higher win?)

Or if I have 16 in wisdom (+3) and my target has 12 (+1), to make the spell work I have to make 10+1-3= 8 or higher or is it my target that throw dices and needs to do more than 12 ?