If this card is Summoned: Return all Set cards on the field to the hand.
Rulings
Individual Card FAQs
You can chain against the effect of "Byser Shock".
A Trap Card like "Ceasefire" that is chained to the activation of "Byser Shock"'s effect is not returned to the hand.
Netrep Rulings
“Byser Shock” does not get its effect if Special Summoned face-down. “Byser Shock,” if later Flip Summoned, it will have its effect resolve at that time. “Byser Shock” will not receive its effect if Flipped as a result of an attack or an effect.
If “Skill Drain” is active or activated in a chain to “Byser Shock's” effect, the effect of “Byser Shock” is negated.
DARK|
Level 5|[ Fiend / Effect ]
ATK 800|
DEF 600