Bitterness
Nero raised his hand to pick up the first ingredient, and then paused. He had just been thinking about how amazing Silas' passive was for card crafting, but that is as far as his thoughts went. But when he moved his hand Nero experienced a whole new function of the ability.
He could determine the angle of movement, velocity, acceleration, deceleration and momentum of his entire arm. More importantly, the information was processed in a completely natural way that was easily comprehensible.
To be fair, the human brain already calculated all of these things on its own. An example would be trying to hit a moving target with a ball. Not only would the brain have to calculate the velocity, path and acceleration or deceleration of the target, but also that of the ball that would be thrown.