When a creature the Caster can see attacks it with a Weapon Melee Attack Roll or Spell Melee Attack Roll, it can use it's Reaction to impose DIS on the attack roll.
The strike comes down, but their blade snaps up in a flash, deflecting yours with a sharp clang. The redirection leaves your attack wide and awkward, thrown off by their calculated precision.
These sliders set site audio only, so you can mix against Discord and other apps (phone volume still caps everything).