I think it raised my attack skill twice then the button lit up so that was it. It might be a bug.is the orc trainer in the storage room bugged? when i train ATK or DEF it takes my gold but my stats don't seem to change at all, and the training doesn't seem to complete (button doesn't light up, unlike when i train swashbuckler)
But you can get infinite ATK in the next room after one point, so it's not a big deal in my opinion.