Just like “The Legendary Fisherman” and other monsters that are unaffected by Spell Cards, “Silent Swordsman LV5” can attack normally if your opponent has “Swords of Revealing Light” on the field, and its controller is unaffected by effects like “Toll” and “Gravekeeper’s Servant” when “Silent Swordsman LV5” attacks.
If you control “Blue-Eyes White Dragon” and “Silent Swordsman LV5”, and your opponent activates “Fissure”, the monster with the lowest ATK is “Silent Swordsman LV5”, but it is unaffected by Spell Cards, so the effect of “Fissure” disappears.
“Silent Swordsman LV5” is unaffected by Spell Cards your opponent controls, including those in your opponent’s hand due to “Exchange” or “Graverobber”.
You can Special Summon “Silent Swordsman LV5” with “Autonomous Action Unit”. If “Autonomous Action Unit” is removed from the field, “Silent Swordsman LV5” is unaffected and remains on the field.