Advanced format ruling
Destruction Jammer
Card effect (current official text)Discard 1 card. Negate the activation of a Spell Card, Trap Card, or Effect Monster's effect that destroys a monster(s) on the field, and destroy that card.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.