Card Errata:Big Burn

Old Lore: You can only activate this card when your opponent activates a card that specifically designates a monster in the Graveyard as a target. Remove all monsters in both players' Graveyards from play.

New Lore: You can only activate this card when your opponent activates a card that targets a monster in the Graveyard. Remove from play all monsters in both players" Graveyards.